While the majority of the techniques and technologies used in the CSI shows are accurate and true to reality, the writers and crew readily admit that they "time cheat". Tests that take seconds in the show often take days or even weeks in real life. See more
"The CSI Effect": While often the science and technology portrayed in the series (as well as the other CSI series) is accurate or mirrors sound scientific principle, there have been times when methods have led to results that are simply not possible in the real world. See more
[looking at evidence from a murder case
I can't wrap my head around it, Mac. You get up, you go to work, see the people that you know, you talk, you laugh. You're living your life, then suddenly, boom. It's just over. Just like that, and you never even saw it coming.