20/20

When a husband is violently murdered, his wife and her alleged lover become suspects. Learn more about your ad choices. Visit megaphone.fm/adchoices

John Quiñones examines why investigators say an act of "divine intervention" helped them solve a Minnesota farmer's murder. Learn more about your ad choices. Visit megaphone.fm/adchoices

The murders of three young girls in 1977 turned an Oklahoma community upside down after the case went cold for decades. Learn more about your ad choices. Visit megaphone.fm/adchoices

This bonus episode of 20/20, hosted by contributing anchor Deborah Roberts, features exclusive behind-the-scenes details from Josh Margolin, one of the leading reporters in this shocking murder case that rocked a small town in Arkansas to its core.  When authorities find a well-known former state senator murdered outside her home in Arkansas, rumors began to fly. Who killed Linda Collins-Smith? Could she have made a fatal enemy along her meteoric rise in state politics?  Learn more about your ad choices. Visit megaphone.fm/adchoices

Video evidence leads police to learn the shocking identity of a former Arkansas senator's killer. Learn more about your ad choices. Visit megaphone.fm/adchoices