Forensic Criminologist Enrico Togneri in Nevada explains exactly what can be learned from evidence on a crime scene: What can be learned from the shape of a blood stain or a piece of cheese. (4 minutes)
Sometimes criminals return to the scene of their misdeeds — to try to make things right, to try to undo the past. Katie Davis reports on her neighbor Bobby, who returned to the scene where he robbed people and conned people.
Samantha Broun interviews her mom about surviving a brutal attack by Reginald McFadden 20 years ago, and sets out to interview friends, family and policymakers about how that attack changed Pennsylvania law regarding life sentences at the time.