Husband and father, Peter Rowe, is immediately the prime suspect in the murder of his wife and attempted murder of his 7-year old daughter after CSI investigators figure out that he was the main suspect in the murder of a P.I, Trevor Murphy, more than 12 years ago. Rowe, aka Mark Redding, had since changed his name to hide from his past. Rowe's interrogation leads investigators to Murphy's children, who always believed Rowe was their father's killer. With revenge on their minds, they tracked down Rowe with the intent to kill him, instead finding his wife and child. CSIs also look into the deaths of two teenage boys in what initially seemed like a case of drunk and reckless joy-riding. Through forensic evidence investigators find that this was no accident -- a frustrated old man wanted to teach those boys a lesson on the dangers of vandalism.