Episode 4 of “A Dark Turn" is the first in an occasional series exploring the unsolved Boca mall murders and abductions of 2007, ritualistic crimes that left two mothers and a child dead, saw five victims kidnapped, and a sixth robbed. America's Most Wanted Host John Walsh called the crimes--which involved ritualistic binding and placement of blacked-out motorcycle goggles over the eyes of several victims--the work of a cunning, pathological serial killer. Click to listen to episode 1 in this series: "A Shopper's Paradise."