Hundreds of Americans die every year from accidental carbon monoxide poisoning. But, according to police in Ohio, one of those deaths, wasn't an accident - it was murder.

She was charismatic, talented - a young mother. When she died violently, her family hoped for quick justice.

A report on the November 1994 murder of Farah Fratta, whose body was discovered in the garage of her Humble, Texas home. In the midst of divorce, the details of her divorce papers revealed a dark side of her soon-to-be husband making him a prime suspect.

As a 17-year-old, Marty Tankleff, was convicted of murdering his adoptive parents Seymour and Arlene in their Long Island home. Though Marty initially confessed, he quickly recanted and has fought for years for his innocence.

A funeral director in Denver, Pennsylvania, calls 911 to report that he had just found the body of his wife, Jan, at the bottom of their swimming pool. Her death is ruled as a homicide and further investigation reveals disturbing facts about the widower.

Amidst a 2010 investigation of a missing teen near San Diego, the prime suspect John Gardner, offers to lead police to the body of another missing teen, Amber DuBois - in exchange for avoiding the death penalty.