Dredging the bottom of Forensic Science, this meeting gives us more bitemarks

Above, this meeting’s theme, overlayed onto the Nevadan sunset, is “Transformation: Embracing Change”

In fitting irony, attendees at next week’s American Academy of Forensic Sciences meeting in Las Vegas will hear bitemarkers hoping to sway public and professional sympathies against their proposed “eradication” by scientific and criminal justice peers. Fierce to the bitter end, this patter is a blend of bitemarkers cloaking themselves as beyond (and immune to) scientific proofs expected by the courts and a lady “explainer” prosecutor who says that is just AOK. These two recently had their bitemarks opinions removed from a New York v. Dean homicide case by her DA. Caveat Emptor

Scorched Earth Forensics — Why The Move to “Eradicate” Disciplines From the Courtroom Is Bad for Science and Bad for the Law 


Melissa Mourges, JD*, New York County District Attorney’s Office, One Hogan Place, New York, NY 10013; and Roger D. Metcalf, JD*, Tarrant County, Medical Examiner’s District, 200 Feliks Gwozdz Place, Fort Worth, TX 76104

After attending this presentation, attendees will explore the debate behind calls to “eradicate” various forensic disciplines as being insufficiently “scientific.”

This presentation will impact the forensic science community by explaining the dangers to victims, defendants, and civil litigants if the move to “eradicate” various forensic disciplines succeeds.

When the 2009 National Academy of Sciences (NAS) Report, Strengthening Forensic Science in the United States: A Path Forward, was published, how many of us realized that “the path forward” would involve a concerted effort to impose a wholesale ban on the use of well-established forensic disciplines? Calls by highly placed government officials to “eradicate” entire fields of evidence, along with well-funded attacks by defense groups, threaten to undermine the civil and criminal justice systems rather than to fix them. Jo Handlesman from the White House Science and Technology Office blasted forensic odontology and other disciplines, saying they were not based on science but relied on “gut reaction.” She said, “These are the types of methods that must be eradicated from forensic science and replaced with those that come directly out of science.”1

Any discussion must recognize that testimony by forensic dentists, although grounded in sciences like anatomy, histology, and dental medicine, is also based on the skill and experience of the forensic dentist, including his/her skill in pattern impression analysis. The same holds true for forensic pathology, forensic psychiatry, latent print analysis, and a host of other disciplines. None of these are bench sciences in which the same experiment always yields the same result. After all, we do not shoot volunteers at point-blank range to study gunshot wounds, or feed people increasing amounts of fentanyl to determine the lethal dose. Instead, we wait until they present at the emergency room or at the morgue and make observations that inform diagnoses and conclusions.

Any discussion must also accept that each bitemark is a unique event, as is every injury to a murder victim; every latent print is left under unique circumstances, as are footprints or tire tracks at a crime scene. Diagnoses of mental illness and its effect on criminal responsibility can be highly subjective and fiercely debated among experts. Ultimately, it all constitutes opinion, albeit expert opinion. How do we determine what comes directly from science, or what definition of science or evidence controls?

Defense counsel often seek to introduce the very kinds of evidence slated for extinction; this scorched earth approach affects everyone. Suspects often benefit from the threatened disciplines. Identification of one suspect exonerates another; forensic evidence provides proof of self-defense or consent. Post-conviction testing requests always seek proof that “some other dude did it.” Careful thought must precede any move to eradicate forensic odontology. Many child abuse and fatality cases involve bitemark comparisons, where victims live with the perpetrator and DNA may be cleaned away or is simply not probative.

Although important lessons are learned from exonerations, decisions to eradicate 2016 forensics because of 30-year-old mistakes will have far-reaching negative effects. Newspapers only report plane crashes, not the overwhelming number of safe landings. With courts already equipped to handle opposing forensic theories through discovery, cross-examination, and experts for each side, it is far wiser to improve forensics rather than eradicate them.

Reference(s): 1. Handlesman J. International Symposium on Forensic Science Error Management – Detection, Measurement and Mitigation, Arlington, VA, July 20-24, 2015. Forensic Odontology, Pattern Impression Analysis, Eradication 670


About csidds

Dr. Michael Bowers is a long time forensic consultant in the US and international court systems.
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3 Responses to Dredging the bottom of Forensic Science, this meeting gives us more bitemarks

  1. John Lentini says:

    I hope there is time for questions from the audience.

  2. Gil Sapir says:

    bring your own popcorn, peanuts, cotton candy for the standing room only crowd

    On Sat, Feb 20, 2016 at 1:20 PM, FORENSICS in FOCUS @ CSIDDS | News and Trends wrote:

    > csidds posted: ” Above, this meeting’s theme is overlayed onto the Nevadan > sunset is “Transformation: Embracing Change” Attendees at next week’s > American Academy of Forensic Sciences meeting in Las Vegas will hear: > Bitemarkers hoping to sway public and professio” >

  3. Maybe the entire discipline shouldn’t be “eradicated”. Maybe only certain people testifying to the strengths of the discipline should be “eradicated”…starting with Melissa Mourges and Roger Metcalf. Put a name and face to the idiocy and keep them on a “No Testify List”.

    Or assign a pecuniary damage against those Experts whose testimony DOESN’T sway the jury or are later found to have provided false and misleading testimony. Monetize “stupidity” and make them personally accountable (not “State Actor” taxypayer accountable), then maybe things will change.

    Until then, I charge $500/hour for my Magic 8-Ball.

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