Evidence, Popular Culture, and the “CSI Effect”
“We’ve got a match.” If you’ve ever watched CSI or any of its several spin-
In fact, most of the evidence presented by the show’s crime scene investigators is far from indisputable, and the show’s portrayal of forensic science is sometimes closer to science fiction than science fact. Fiber evidence, for example, can be examined for possible connections, but no scientist would be able to testify under oath that a specific fiber came from a specific vehicle. Only DNA evidence really comes close to what most scientists would consider mathematical certainty (Toobin, 2007). The show also misleads juries about the technology available to prosecutors—
Some legal scholars worry that the popularity of shows like CSI may bias juries in several ways. There is a possibility that jurors who follow the shows believe they have developed some level of expertise about forensic evidence or, at the very least, some expectation that the kinds of evidence presented on CSI will be available for every case, a theory that has become known as the “CSI effect.” Although there is no evidence that watching such programs has any impact on trial outcomes, there are some indications that watching these shows may influence the way jurors perceive the quality of police work in investigations as well as their behavior during deliberations (Rath, 2011; Thomas, 2006).