Grandfather Jack Rains, 83, is murdered in his home in Murfreesboro, Tenn.; when rumors emerge of an affair between the victim and a women half his age, police start to investigate his close friends.

Elderly couple Roy and Angie Woodley are found brutally stabbed to death in their Fresno, Calif., home; believing the crime to be a robbery-gone-wrong, detectives soon realize the perpetrator may in fact be a family member with a grudge.

While searching for Tami Reay, detectives find blood in her car and arrest her husband, Brad; then, they receive a tip pointing at an entirely different suspect.

After Joe Morrissey is brutally killed in an apparent home invasion, detectives come to believe that the attack was personal and focus on Joe's wife, Kay.

Melissa Atkin is found bound and murdered in her home in Smyrna, Tenn.; the investigation zeroes in on two individuals and involves a series of recorded phone calls exonerating one of them, whilst incriminating the other.

Father of two John Riebe is found dead from bullet wounds on the floor of his home in Toledo, Ohio; the investigation quickly turns on those closest to Riebe, and a series of phone calls and voice mails prove key in uncovering a shocking betrayal.