Investigators analyze the evidence and explore the various theories as to who this ruthless barbarian could be, including what job could have afforded him the time to commit his heinous crimes; where he may have lived; and how he managed avoid detection.

The Golden State Killer has been identified by law enforcement as Joseph James DeAngelo.  Now accused of committing some of California's most heinous crimes, this man was hiding in plain sight.  Hear from those who knew him and the investigators who spent a lifetime tracking him down.