Myth: Crime scenes are processed quickly
“I roll my eyes about the speed at which crime scene investigators [on TV] get results back from the lab,” McKenna says. “It takes a very long time to process a lot of the evidence obtained, especially Hollywood’s most popular kind of evidence—DNA.” He explains that processing DNA evidence takes well over 50 hours of lab work—which equates to more than six workdays. And that’s only if the lab techs have a clear schedule.