The tickle of curiosity. The gasp of discovery. Fingers running across the keyboard.

The tickle of curiosity. The gasp of discovery. Fingers running across the keyboard.

The World of Iniquus - Action Adventure Romance

Showing posts with label Crime. Show all posts
Showing posts with label Crime. Show all posts

Tuesday, November 26, 2013

The SIRCHIE Education Training Facility Tour - by Patti Phillips




SIRCHIE makes hundreds of products for the law enforcement community and offers classes in how to use those products at their Youngsville, North Carolina Education and Training site. Several crime writers were allowed an unprecedented opportunity to attend a five-day, hands-on training session, so that we could learn more about the latest and best gadgets being used to catch the crooks.

During the first two days of Evidence Collection Training, we used a number of chemicals, fingerprint powders, and brushes, and employed several different fingerprint lifting techniques on a variety of tricky surfaces. We discussed the benefits of both cheap and costly Alternate Light Sources.

Our notebooks were filling up and theories of the perfect crime were flying around the class. We kept quizzing Robert Skiff, our instructor, (SIRCHIE Training Manager/Technical Training Specialist) about ways to ‘get away with the murder of the decade.’ But as we learned, there is no perfect crime. That pesky trace evidence will always be waiting at every scene for the investigator to discover it, photograph it, tag it, bag it, and transport it without losing the integrity of the sample.

It was time to visit the plant – see how the powders, brushes, and other crime scene paraphernalia were made.

SIRCHIE manufactures most of its products in-house. The specialized vehicles for SWAT, bomb rescue, arson investigation, and surveillance work, etc., are built in New Jersey, but the smaller products are produced right in North Carolina.

Security was carefully controlled throughout our tour. Most of our group writes crime fiction, so we are always looking for a way our fictional criminals can break in (or out of) a wild assortment of locations. As we walked through the stacks and aisles of products, we commented to each other on the smooth organization and many checks SIRCHIE had in place. Cameras everywhere. Limited access to the assembly floor. Labyrinths a person could easily get turned around in. If we got separated from the group while taking an extra photo or two, we were found and escorted back by an always friendly employee.

Of course, we couldn’t turn into rogue students anyway. Our fingerprints littered the classroom and they knew where we lived.

Security plays a part in the assembly model as well. Each product they create is put together from start to finish by hand. There are no assembly lines because of trade secrets and a dedication to preserving product integrity. Personnel are carefully screened before being hired and qualification for employment includes graduate degrees. No criminal history whatsoever is allowed. Every employee comes through the Evidence Collection Training Class so that they understand what SIRCHIE does as a whole.


Tool and Die Machinery

Templates for the various products are created in-house. The operators of these machines are highly trained experts. Quality control is paramount, so training is constant.


Printed Supplies
Scale Strips
All the printing is done in-house. The printing area was stacked with cases of items being printed for shipment. We saw ink strips large enough to process tire treads.

Field Kit
Field Kits are created for general use by investigators, but can be specifically designed for a special need. The small vials contain enough chemicals to test unknown stains and substances at the scene. Note the dense foam holding the vials and bottles firmly in place. The kits are usually kept in the trunk and probably get tossed around quite a bit. The foam insures against breakage during car chases and while bumping across uneven road surfaces.

Finger Print Brushes
There are fiberglass brushes, feather dusters for the very light powder, regular stiffer brushes, and magnetic powder brush applicators.



Brushes Completed
We were lucky enough to see fiberglass brushes being made.



Gun Box
If a handgun is seized for evidence, there needs to be a simple, yet effective way to track chain of possession.
*Bag the gun to preserve the fingerprints and
*drop the gun in the box.
*Then fill in the blanks on the box.
*Easy to stack and store until needed.
Think of all the cases that may be ongoing in a large jurisdiction – the evidence is not sitting at the police station. It’s in a warehouse someplace, and needs to be easily identified when required for court. In addition to several sized boxes for guns and knives, etc. SIRCHIE also provides an incredible assortment of resealable plastic bags for preserving evidence like clothing, unidentified fibers, etc.


Wendy with Magnetic Powder
Magnetic powder was being processed that day and then put into rows and rows of jars and jugs. Before it is sent out to the customers, each lot is tested for moisture content, appropriate ratio of ingredients and other trade secret tests. We joked about taking some back to class for the next round of fingerprint study and were surprised by how heavy the jugs were.


Cyanowand Cartidges for Glue Gun
No, she’s not making bullets. She is assembling the cyanowand cartridges used for fuming with superglue.

SIRCHIE Makes Riot Gear
Riot Helmet Drills
This is not a photo of something from a SyFy movie. At the center of the shot is a helmet template. The drills encircling the template are aimed at spots where holes are needed for each helmet, depending on the type of helmet in production. All the holes are drilled at the same time.

The helmet before anything
 has been added to it
 
.

Helmet Padding
Buckles for Helmets


Padding is inserted after the buckles are attached.
Helmet Component
Helmet Neck
Helmet Faceguard














Completed Riot Helmet



The Optical Comparator, as well as the other machines, are built to order by hand.


While in the warehouse, we learned that if a product is discontinued, it is still supported by SIRCHIE. That means that if a law enforcement officer calls up with a problem a few years after purchasing a machine, he can still get help. Reassuring for jurisdictions with a tight budget that can’t afford to replace expensive equipment every year or two.

SIRCHIE sends supplies to TV shows, so next time you’re watching a fave detective or examiner lift prints with a hinge lifter, it may have come from SIRCHIE.


Great tour, great people who work so hard to keep the law enforcement community supplied with the gear needed to catch the bad guys.
A big thanks to Patti for stopping by today.

Patti has been a contributor to several articles here on the blog including: Finger Printing LINK and Footwear Evidence LINK. You can find a link to her blog NIGHTSTAND BOOK REVIEWS under my  
"Blogs I Follow" on the information strip on the right hand side.  Also check out Kerrian's Notebook LINK  

If you have any questions, please leave them below, and we will do our best to help.

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Monday, November 18, 2013

The Death Investigator - A New Character Arrives On the Scene: Information for Writers


______________________________________________________


Manuel looked at the dark holes in the men’s foreheads. Felt the silence. Dead. Yes, must be dead. They were dead. Manuel’s mind tried to grasp this simple fact. 
 ~  Missing Lynx



 So you're writing right along, thrilled that your fingers are tripping over the keys when shock of all shockers your heroine stumbles on a body. She toes it, hoping maybe it's just a drunk, but the smell tells her she's not so lucky. Shoot! Not only did you give your heroine a very bad day and the seeds of her future nightmares, but now your romance has turned into something else. Who should she call?

Well, 911 to begin with. But they will send out a group of people who are not all playing on the same team. One of the players MUST be the coroner (if it's a small town or rural area) or the coroner's investigator/death investigator.

Well who is that? They've never shown up in any of the books you've read.


Death Investigators or Coroner's Investigators - 

* are specialists who become involved in all deaths that
   were not expected. 
* They help determine if the death should 
    be further considered for criminal review or if the cause was
   natural or accidental in nature. 
* These are the people who show up to represent the coroner and communicate with the coroners office. 
* If necessary they take photos and start to gather information for a forensic death investigation.
* Focuses on the pathology. They assume foul play until it is proven otherwise.
* Develop cases for criminal acts of murder or manslaughter
* Develop cases for civil suits such as product safety failures
* Coroner's Investigators are called to testify in court.
    Video Quick Study (4:53) Testifying as to her job
    Video Quick Study (1:38) death investigator talks about how many deaths he handles and talking with
                                             families.

PLOT TWIST POTENTIAL - the death investigator tries to document EVERYTHING because a body can change in transit. For example, the hearse could be in an accident when the murderer pursues them and forces the car off a cliff! The body could be jetted out the back. Now the body looks very different and perhaps the tell tale markings were abraded away...  

There are no federal laws that govern death investigation. The Model Postmortem Examination Act 1954 LINK to Act gives states guidelines for their laws. So you'll need to figure out the laws for the state your body is found.

Deaths must always be reported (though not necessarily investigated) when there is a:
* homicide (or possible homicide)
* sudden or unexpected death
* suicide
* in any institution other than the hospital
* work related
* public

1. Once a death investigator arrives they start documenting the basic questions:
* Who found the body BUT NOT who killed the person
* What was the condition of the body (clothing etc.) this includes stains, tears, and markings
* Where was it found - this includes the temperature and humidity levels as well as objects in the vicinity.
* How was it placed

Notice that there is no WHY? the "why" belongs to someone else. Though they might gather information that would help with an autopsy such as evidence that the person was depressed/suicidal.

2. They will then make decisions about preserving and transporting the body
3. Try to identify time of death
4. Up close and personal - a death investigator will
* Interview family and friends for clues into the death.
* Search the dead person's home to include reading materials, computers, read their journals etc. trying to get
   an understanding of what might have happened. They might, for example, collect the medical bottles to see
   if there was an interaction that killed the person. Or there was a possible overdose.
   LINK to blog article on Forensic Toxicology

Need a plot twist???

What is a coroner? Video Quick Study (1:49)
Coroners are sometimes elected and may have no idea what they are doing.
In many places, the person tasked with making the official ruling on how people die isn’t a doctor at all. In nearly 1,600 counties across the country, elected or appointed coroners who may have no qualifications beyond a high-school degree have the final say on whether fatalities are homicides, suicides, accidents or the result of natural or undetermined causes.LINK  
Video Quick Study (3:49) Untrained coroner and Michael Jordan's father's murder case.
Video Quick Study (3:24) Recommended standards that would make the death investigation accredited and peopled by doctors run by medical examiner not a coroner.
This is long but very interesting and informative. Video LONG study (1:09:37)

See how this article influenced my plot lines in my novella MINE and my novel CHAOS IS COME AGAIN.





Thank you so much for stopping by. And thank you for your support. When you buy my books, you make it possible for me to continue to bring you helpful articles and keep ThrillWriting free and accessible to all.

Monday, September 30, 2013

Walking Through Forensic DNA Basics: Information for Writers

______________________________________________________


Animation of the structure of a section of DNA...
 (Photo credit: Wikipedia)
This week I had the opportunity to go down to Richmond to visit the FBI headquarters. A handful of Sisters in Crime Members were being hosted by the FBI Evidence Response Team. I want to thank the team for sharing their expertise. (Names and images are withheld for security purposes)

That night I learned a lot about processing the scene of a crime, collecting everything from foot prints BLOG LINK - Footwear Evidence to  fingerprints BLOG LINK to Fingerprint Evidence to fibers.

But the gold star belongs to DNA. DNA has risen to be THE  best available evidence because the laboratory results are statistically linked to a single person and exclude all others.

Did you know that with the improvements in science, they can now trap enough DNA in a fingerprint to create DNA profile?

If you are writing a story that involves a crime, it's likely that your investigation team will be looking for DNA to collect and use to solve the case.


Processing Blood Samples, FBI
Forensic analysis of DNA can be confusing so let's walk through this together.

STEP ONE - What Is DNA? 

First the bilology basics. I know. I know. It's the spinach on your plate. But it's important, so I'll try to make this as quick and as painless as possible.


DNA - Deoxyribonucleic Acid -
* All cells have DNA (except red blood cells)
* DNA is the genetic material making up our chromosomes
* Gene – the basic unit of heredity; a sequence of DNA nucleotides
   on a chromosome.
* Genome – the sum total of an organism’s genetic material.
* DNA encodes the instructions for when and how to make
   proteins. These proteins tell the cell how it will
   function - is it a brain cell? a liver cell?
* It looks like a twisted ladder. The uprights are made out of
   phosphates and sugars. rungs are pairs of
   smaller particles called nucleotides.


You're doing great! Hang in there!


English: DNA replication or DNA synthesis is t...
(Photo credit: Wikipedia)
* All DNA is made up of a combination of four letters
  G - Guanine
  C - Cytosine
  A - Adonine
  T - Thymine
* G and C got together A and T go together
Happy Valentines Day - Relationship Mitosis
Mitosis (Photo credit: id-iom)

Mitosis -
* DNA replication
* A cell splits by dividing like a zipper
* The new cells contain an identical set
   of cells as were present at conception
* This only changes when there is a
    random mutation
* All cells in the whole body contain the
   exact same DNA

Video Quick Study of Mitosis (1:29)
VIDEO QUICK STUDY (8:03) basic info on DNA and Mitosis - might be more information than you need, but the presentation is thorough and easily understood.


STEP TWO - There Are Two Kinds of DNA
Prokaryotes are primitive cells, without a nuc...
 (Photo credit: Wikipedia)

Nuclear DNA-
* It is found inside the nucleus packed
   into chromosomes
* It is inherited from both parents
   50% from our mom and 50% from
   our dad.
* Each parent contributes 23
   chromosomes for a total of 46.
* The dominant and recessive qualities
   gives us our traits
* A DNA profiles belongs to an
   individual and ONLY that
   individual and no one else in the world    UNLESS we have an
   identical twin. Plot twist!
* The closer we are in genetic
   relationship to someone else, the
   closer the DNA configuration.
* Each cell has one copy of nuclear DNA


Mitochondrial DNA-
* Is found in mitochondria
* 100% of mitochondrial DNA is inherited from mom.
* The mitochondrial DNA is the same in our brothers and sisters
    regardless of who fathered each child.
* All mitochondrial DNA came from your mom which came from 
   your mom's mom which came from your
   mom's mom's mom etc. How cool is that?
* Is not housed in a a set of chromosomes
* This DNA is smaller than Nuclear DNA
* This DNA is present in larger numbers than Nuclear DNA
   (nuclear DNA has just one copy per cell)
* This DNA tends to be more stable than Nuclear DNA over time.

VIDEO QUICK STUDY (1:58) Two Minute Science Lesson: How DNA Testing Works

STEP THREE - Collecting DNA Evidence

Maryland V. King Police can collect DNA without a warrant Video Quick Study (1:55)


Biological evidence is perishable
* DNA will fragment
* The best shot at getting useful DNA is in a fresh sample
* Fresh tissue has more nuclear DNA and an older sample has less

Things that cause DNA to degrade

* UV light
* Acid
* Bleach
* Hydrogen Peroxide
* High humidity
* Heat and Fire
* Anything that oxidizes biological molecules


Handle with Care:
Video Quick Study (2:16) Mentions the changes in technology and the importance of properly preserving the sample.

* If the evidence that is being collected is wet it should be air dried.
* The evidence should be stored in a PAPER BAG that can release
    moisture
* Store in low temperatures (this prevents bacterial or fungal
   growth that has its own DNA)
*  Avoid as much as possible environmental contamination.

Crime Scene Techs:
* Need to understand that they can be contaminated by the crime
   scene (pick up bacteria etc.)
* Can contaminate a crime scene with their own saliva, dander, hair
   etc.
* The FBI Processing unit that I visited this week uses full Tyvek
   suits to prevent contamination of the scene.
* People who were on the scene will often be asked to give a DNA
   sample called an "ELIMINATION SAMPLE"
* Most often reference samples are taken from a buccal swab. A
   square piece cotton is swabbed over the
   inner cheek. This is placed in an envelope. Why not a vial?
   Because a closed container encourages the
   growth of other life forms. 
   VIDEO QUICK STUDY (3:07) How to collect a buccal sample.
* DNA elimination samples are collected from victims and
   witnesses etc.




English: A forensic scientist at the U.S. Army...
. (Photo credit: Wikipedia)

PLEASE NOTE this elimination sample does NOT get run through the system. It is merely there for the scientists to compare with the sample they are analyzing. Your character will NOT be located and charged with a previous crime. There are all kinds of privacy laws that prevent this from happening, according to the FBI agents we were interviewing.


Death Investigators: What if you have a body to identify?
If the investigators have an idea who this might have been they can get a swab from a blood relative and try to find markers that they share. If no relative is available, then they could go to the person's home and try to collect DNA there from a toothbrush or razor, etc.

What if the house burned down and DNA from that location is not available? Well, investigators could try to find stored DNA samples, for example a woman's pap smear might be stored or perhaps your character had given blood to the Red Cross.

Here's a VIDEO QUICK STUDY (6:09) that gives a simplified description - good overview. 
STEP FOUR - Extracting and Processing DNA

Extracting DNA isn't hard you can do it right now in your own kitchen. Don't believe me?
Video Quick Experiment for You to Try (2:46)
Video Quick Study - Separating DNA from Blood (6:37)

In extracting DNA from Crime Scene or reference samples, the goal is to find the 1% that differs from everyone else. This gives an individuals DNA Fingerprint or DNA Profile.

99.9% of our DNA is the same in all humans. Only .1% differentiates us


* DNA is stiff and brittle. In order to avoid damaging it, a

   technique is employed that breaks down the cell around it.
* In a crime scene laboratory being meticulous is paramount.
VIDEO QUICK STUDY - (6:19 - but go right to 3:00 mark) this
   process is better explained through this video than writing the
   steps because of the equipment

IF YOU ARE WRITING A BOOK THAT TAKES PLACE IN THE 80s OR 90s use RFLP:


RFLP Analysis - Restriction Fragment Length Polymorphism not widely used since the mid-90s
* A large sample is required
* Results are not compatible with major DNA databases
* The proces uses molecular scissors to cut where a TA next to a
   CG combos. Since everyone has different DNA profile's the
   material created will be of different lengths. (15-35 repeating
   base pairs)
* This is then processed with Gel Electrophoresis
   Video Quick Study (5:18) Frankly this is the quickest, easiest
   way of understanding the process

To correct the problem of sample size, scientists developed PCR - Polymerase Chain Reaction
* This was developed in 1983 as a method for replicating DNA
VIDEO QUICK STUDY (3:32) sorry this has no audio, but it is
   the best quick study I could find
* PCR takes advantage  of the DNAs double strand and its simple
   code
* Uses a thermocycler to double the amount of DNA with every
   cycle.
* Only one strand of DNA can make a billion copies in four hours

IF YOU ARE WRITING A BOOK THAT TAKES PLACE AFTER Mid-90s use STR:

STR - Short Tandem Repeat
* It still uses PCR to make copies
* STR focuses on the smaller repeating units in DNA
* STR uses only about 3-7 repeating base pairs (where RFLP
   needed 15-35)
* Can be used on much smaller samples than RFLP
* Can be used on more degraded samples than RFLP
* Only 18 cells are needed to get a DNA profile - this is why they
   can pick up DNA from a fingerprint, according to our FBI
   instructor.
* Uses Capillary Electropheresis -  done in a column (not in a flat
   gel as in electrophoresis)

THERE ARE 13 DIFFERENT CORE LOCATIONS WITHIN DNA that captures most of humans variability in STR


CODIS FBI Logo
CODIS FBI Logo (Photo credit: Wikipedia)

* Each core location has its own
   established probability of being
   found in the larger population.
* When all 13 different probabilities
   are added together the statistical
   probability are in the quadrillions.
* These can be put into the CODIS
 (Combined DNA Index System)
  developed by the FBI in the late
  90s. Pay attention to this date if
  your story happens before this time
  period.


Recently they've developed a way to tell if the DNA comes from a man or a woman by looking at the sex chromosomes. (XX or XY) They do this by looking at the amelogenin gene on the sex chromosome. It is longer in a man than woman but this is enough to tell the difference. This is important because sometimes there is a mixed sample of DNA, for example if they do a vaginal swab for sperm.


STEP FIVE - Is It a Match?

Reading the computer output is outside of the scope of this article - though I will address this in the near future.


CODIS 13 point profile
CODIS 13 point profile (Photo credit: Wikipedia)
The information gathered is analyzed and a statistic is assigned.
Population Genetics gives us
    statistics about the likelihood of this
    profile occurring in a population. It is
    a PROBABILITY that the same
    profile is replicated in the population
    and not coincidence.
* The more stretches of DNA that are
   compared between two people the
   statistics possibility of error narrows.
   It can become so narrow that it
   EXCLUDES everyone
   else from the pool of possibilities
   EXCEPT an identical twin.




Okay how was that? Not bad right? We made it to the end of the DNA pathway. Now as you sit on the bench to catch your breath, let's review some points at which a plot twist could mess everything up:

* Has the prosecution kept tight control of its chain of who has
   custody from collection to end result?
* Was the biological material from which the DNA was extracted
   identified? For example, in a rape case was it semen that is being
   identified?
* Is the testing laboratory accredited?
* Has the testing laboratory  been audited by an outside agency?
* Has the testing laboratory  undergone a proficiency test - and was
   it a blind test?
* Did the laboratory run the required control samples?
* Was there examiner bias? Did the tech talk directly to the
   investigator or was it blind?
* How large was the DNA sample? Was it from a pool of blood?
   Or was it from a fingerprint?
* What if your character -- either victim or accused -- has a relative
    involved in the research (or an ex-wife eek!)?
* Was more than one DNA profile mixed in the sample?

So many ways to play with DNA evidence! 



EDIT 
Intermountain Forensics:
This is very good! If we could add to your collection: CODIS Core Loci is now 20 markers and keep an eye out on next generation sequencing and genetic genealogy for the future of forensic DNA. Nice work!

Thank you so much for stopping by. And thank you for your support. When you buy my books, you make it possible for me to continue to bring you helpful articles and keep ThrillWriting free and accessible to all.

Monday, July 29, 2013

Police Sketch Artists - Drawing on Witness Recall


___________________________________________________________________________________



There on the TV screen, I saw the rendering of my attacker. The life-like drawing stunned me. With eyes fixed on the picture, my heart staggered drunkenly around my rib cage and panic twisted my lungs. Stalker leered down at me, a big man of mixed racial background with almond-shaped eyes and a flat nose over a wide full mouth. Two scars disfigured the left side of his face -- one ran from his nose to the corner of his lip, and another ran from his eye to his chin. On the right side, he adorned himself with a tribal tattoo that showed black against his light brown skin.
 - WEAKEST LYNX

Your heroine survived the attack. She's sitting in the police station, drinking the swamp water they call coffee from a Styrofoam cup. A police artist takes your heroine down a long, echoing hallway to a quiet office. What will your heroine encounter?

The Police Artist's job is to make a rendering called a COMPOSITE SKETCH to be used to apprehend and possibly help convict the criminal.
  
* Ideally, the artist has a combined background in police work/criminology, art, and psychology.
* The room will probably have a comfortable chair for the witness. It will be void of face images - no art, or
   wanted posters or any other image that might subconsciously impede a good witness report.
* The artist will sit off to the side so the artist's own face doesn't get confused with the memory.
* The artist usually starts with open ended questions while making the initial rendering, "Tell me about the
    shape of his jaw line?" Then the artist shows the sketch to the witness. At that point, specific questions are
    asked. "Are his eyes the right distance apart?"
At the end of the interview the artist signs and dates their work – in case the composite sketch ends up in
   court as evidence.
* The process will last 1-2 hours

VIDEO QUICK STUDY (7:24) - An artist at work and his interview techniques

One of the first questions that the artist will ask is about race. The reason for this is not to determine the skin color but the underlying bone structures (skull shape and facial geometry). There are three main bone structure families
*Caucasoid
* Negroid
* Mongoloid
(There is also Aboriginal, which does not anthropologically fit into these three categories)

Next they will be asked about the age. The differences in bone structure shifts are most apparent in children, however, in adults the shift comes mainly in skin texture, tone, and thickness.
VIDEO QUICK STUDY (1:28) showing an age progression rendering and discussion of what factors are considered.

And then they will ask about body build.

An author will have to decide whether the witness is a good witness or not. 

The artists need to have good interviewing skills including an understanding of memory and how trauma effects it (more about this in next week’s blog). The goal is a quality representation of the suspect with an emphasis on forensics.  LINK to blog article about witnessing in F.A.T. Simulation 
* Does your witness have good eye sight?
* Are they dexterous at visual processing? Do they have a "memory for faces?"
* Is your witness someone who is detail oriented and paying attention?
* Memories can be distorted by stress
* Cross-racial features can be confusing
* Consider the lighting conditions
* Consider how fleeting the view
* Consider the angle of view

As the author, you will need to decide what techniques your artist will use

1) Interview with Hand Rendering

    From my art classes I learned that:
   * faces are generally not symmetrical
   * the face is generally 5x the width of an eye
   *The width between the eyes is generally the width of one eye
   *The eyes are about half-way down the face
   * the ears and nose are roughly the same height

    It is the artist's job to find where the suspect's facial geometry shifts from the Greek/Classical ideal.
   
    VIDEO QUICK STUDY  (1:10) an artist using a ruler to portion properly while rendering a time lapse
    drawing of a suspect. 

2) Catalog  

Scientists using scanners have found that we spend less time looking at the lower face. Our focus stays on the upper face. And surprisingly, (to me, anyway) less focus on the eyes than the rest of the upper face. The forehead, the hairline, and hair have priority in our memories. So if your character wants to disguise themselves, they should pay more attention to wearing hats and wigs. 

People recognize things more easily than they can recall them. For this reason, science indicates that the benefit of offering photos outweighs the bias that they could produce. So artists have binders that divide the different zones of the face into options from which the witness can choose. FBI facial ID catalog. Also photo albums of tattoos, scars, hats, clothing, and glasses are helpful for witnesses to use in  identification.


VIDEO QUICK STUDY 1 (2:16) Police artist discussing his use of the catalog
VIDEO QUICK STUDY 2 (2:13) Police artist discusses her use of catalog and her interview technique

3) Computer generated

    The pros include:
    * Faster and allow the artists to swap out one feature for another with ease.
    * Less expensive to produce images this way.
    * Easier to e-mail and easier to store

    Examples of this software include:
    * Identi-kit Link to their website
    * Faces Link to their website

    VIDEO QUICK STUDY (4:49) Using FACES computer composite rendering

One of America's foremost police artists is Karen Taylor  Link to information about Karen Taylor

VIDEO QUICK STUDY (2:48) Karen Taylor helping to solve the identity of "Brush Girl." 




Thank you so much for stopping by. And thank you for your support. When you buy my books, you make it possible for me to continue to bring you helpful articles and keep ThrillWriting free and accessible to all.