CSI: Crime Scene Investigation, along with the rest of the series, are as much as an inside of the crime lab as the regular citizen can get. This includes great but gruesome effects of crime scenes, reinactments(excuse spelling), and the suspense of mystery. There is swearing, but it is not a major concern. Do NOT let your children watch this show or any other CSI series. They would honestly be traumatized. As the title implies, this is for Tough Teens and Adults only.
The messages aren't positive to any teen or young adult, but they most likely will not poison your teen's mind. This is definately violent and will include shootings, chases, and high action thriler. This series is a roller for 13+ and that is that. Shoot! Even I close my eyes sometimes!