I have troucle with all the crime shows. They take themselves so seriously. It's really pretty far from reality, which isn't necessarily a bad thing, but dealing with it all day, it's not really my cup of tea at night.
Although I must say they are leading to more not guilty verdicts. People expect that the police can really solve all crimes through the crime scene investigators, so when there isn't any DNA, or other forensic evidence, (As in the majority of the cases that go to trial) the jury is more likely to think the cops didn't do their work and it goes to our benefit. Pretty fascinating actually.