In Part I of my Spring 2024 cannabis update, I discussed the search and seizure issues arising in North Carolina courts around cannabis. Part II explores drug identification evidence issues surrounding marijuana prosecutions and examines potential challenges defenders might raise. This post will also cover recent developments on the state, federal, and tribal levels impacting cannabis.
expert opinion
DNA Test Results: Probability vs. Fallacy
The State of North Carolina goes to trial against Donnie Defendant, who is alleged to be the infamous “Tarheel State Killer” and charged with committing a series of brutal assaults and murders several decades ago. The state’s case depends heavily on matching DNA evidence from the crime scene to a sample of DNA taken off a cigarette butt discarded by Donnie. At trial, Special Agent Wanda Witness testifies as an expert in forensic DNA analysis for the state. After explaining the science behind PCR, STR, loci, and markers, Wanda opines that Donnie’s DNA is indeed a match to the DNA recovered from the crime scene.
Sounds like good news for the state, but what exactly does a “match” mean? And how may the significance or statistical probability of that “match” be expressed to the jury? It’s an important question, because what might sound like two similar ways of expressing the same probability can have dramatically different meanings – and possibly even be considered error on appeal.
A Rare Opinion on Criminal Discovery in North Carolina
There seem to be fewer and fewer reported decisions about criminal discovery in North Carolina. A recent North Carolina Supreme Court decision finding a discovery violation by the prosecution, State v. Davis (Apr. 15, 2016), made me wonder why. This post reviews the evolution of North Carolina’s criminal discovery laws, which has brought relative calm to this area of law, along with the decision in Davis, which deals with a recurring issue about disclosure of expert opinion.
State v. Osteen: Court of Appeals Approves Admission of Lay and Expert Opinion Testimony Regarding Drug Impairment
Proving that a driver was impaired by alcohol is not all that difficult, particularly when the driver submits to a breath test and the result is .08 or more. Proving that a driver was impaired by drugs or by a combination of alcohol and drugs is considerably more challenging. But an opinion released yesterday by the court of appeals demonstrates one way in which it can be done, even without a confirmatory chemical test.