The director of a lab recognized by the International Association of Chiefs of Police for forensic science excellence has called field drug testing kits “totally useless” due to the possibility of false positives. In laboratory experiments, at least two brands of field testing kits have been shown to produce false positives in tests of Mucinex, …
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Postmortem insect activity may be mistaken for antemortem wounds
According to the North American Entomology Association, it is easy for investigators to attribute postmortem damage to a body due to insect activity to antemortem occurrences. Studies have shown that the insects that feed on decaying bodies often leave behind marks or abrasions that can be misinterpreted by investigators. A recent study conducted at the …
Postmortem insect activity may be mistaken for antemortem woundsRead More
Documenting a client’s symptoms of mental illness
As public defenders, we struggle with challenging clients: clients who don’t trust us, clients who refuse to hear our best advice, and clients who sometimes lash out at us in ways that are difficult to absorb, let alone understand. Most of our challenging clients are mentally ill and a significant percentage of those have poorly …
Vetting Experts – A Wake-Up Call
A recent meeting with a supposed forensic psychology expert reminded me of the importance of attorneys always vetting their own experts. This individual was referred to me by another trusted expert. After our initial meeting, I started looking in to his credentials and quickly learned that he did not have a Ph.D. and was not licensed …
Does a psychology expert need to be licensed in NC?
Attorneys may need the services of a psychologist to evaluate whether a client is competent to stand trial, to present evidence regarding a mental health defense or mitigation, or to perform other psychological testing of a client. Attorneys have asked me whether a psychologist needs to be licensed in NC to perform these services. I’ll …
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Admissibility of field test kit results
In State v. Carter, 237 N.C. App. 274 (2014) the NC Court of Appeals found that a trial court abused its discretion by admitting an officer’s testimony that narcotics indicator field test kits indicated the presence of cocaine on various items. The court cited State v. Ward, 364 N.C. 133, 142 (2010) which held that “expert witness testimony required …
Draft Policy Recommendations by the National Commission on Forensic Science
The National Commission on Forensic Science has released six documents for public review and comment. The Commission’s recommendations, if adopted, will be recommendations to the Attorney General of the United States. However, they may become recognized as best practices for practitioners and courts dealing with forensic evidence. Attorneys or others who wish to comment on these recommendations …
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Stingrays and Privacy
The Florida Supreme Court recently issued an opinion holding that the Fourth Amendment protections apply to real time cell site location information. The court distinguishes real-time cell site location records from historical data, emphasizing that historical cell site location records are not at issue in this case. This real time location surveillance is done with …
NACDL Offers New Training Scholarship for Indigent Defense Attorneys
The National Association of Criminal Defense Lawyers (NACDL) is offering a new program of scholarship assistance for indigent defense providers. The scholarships will be available to public defenders, contractors, and private appointed counsel to allow defenders to attend criminal defense training programs nationwide. These grant-supported scholarships will be awarded in the form of full or …
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What is in a State Crime Laboratory Lab Report?
Many attorneys have asked me what should be included in a lab report from the State Crime Lab. Often in District Court DWI cases or through discovery, defense attorneys receive only a 1-2 page report called a Lab Report. For each case that is analyzed by the State Crime Laboratory, the lab produces a Case …
Familial DNA Testing
by Emily Zvejnieks Familial DNA testing, an innovative yet highly controversial technique, is being used in several states. This blog post will provide an explanation of what familial DNA testing entails and briefly discuss its Fourth Amendment implications. In standard DNA testing where there is an unknown sample, that unknown sample may be compared against …
Shaken Baby Syndrome: How Bad Science Can Result in False Confessions
For the past decade, the theory of shaken baby syndrome has been under attack. See here and here. In January, the U.S. District Court of the Northern District of Illinois granted Defendant Jennifer Del Prete’s habeas corpus petition where her conviction for first degree murder was based on faulty evidence of shaken baby syndrome. Del …
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Cognitive Bias and Forensic Anthropology
A study looking at how the conclusions of forensic anthropologists may be influenced by extraneous information highlights the importance of protecting all scientists from potentially biasing information. Forensic anthropologists determine the gender, national origin, and age of a person at the time of death. In some cases this determination must be based solely on skeletal …
Stingrays: What defense attorneys need to know
Law enforcement agencies nationwide have been secretly using IMSI (international mobile subscriber identity) catchers to track suspects through their cell phones. Typically this surveillance occurs without a warrant or court order. Also called “Stingray,” this device tracks cell phones using the radiofrequency signals radiating from the phone. The device is a shoebox-sized receptor that mimics …
Using cell tower data to track a suspect’s location
With the recent U.S. Supreme Court decision Riley v. California, the topic of cell phone forensics is on the mind of many attorneys. Cell tower location tracking is a related area where investigators gather information about a cell phone’s location using data from cellular towers contained in phone records. Attorneys should be aware that location …
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