Investigator Clarence Douglas tackles the case of Angel Doe, a little girl found dead in a ditch near the Houston Bayou, promising not to neglect her in death, like she was in life.

Investigator Clarence Douglas tackles the case of Angel Doe, a little girl found dead in a ditch near the Houston Bayou, promising not to neglect her in death, like she was in life.

A young woman fails to return to her home in Boulder, Colo, and she is later found decapitated; Detective Steve Ainsworth soon learns she was part of a mysterious Apostolic church group, led by a pastor who has a reputation for preying on the weak.

A young woman fails to return to her home in Boulder, Colo, and she is later found decapitated; Detective Steve Ainsworth soon learns she was part of a mysterious Apostolic church group, led by a pastor who has a reputation for preying on the weak.

In Lake County, Fla., Chief Investigator Rocky Harris is called in to investigate a haunting case, the rape and murder of a young girl; wading through bad police work and dead ends, Harris is sickened when he uncovers the identity of the killer.

In Lake County, Fla., Chief Investigator Rocky Harris is called in to investigate a haunting case, the rape and murder of a young girl; wading through bad police work and dead ends, Harris is sickened when he uncovers the identity of the killer.

A missing person case turns suspicious when a well-liked Wausau, Wis., man doesn't show up for work one morning. Investigator Larry Woebbeking finds himself in an unexpected predicament when the girlfriend of the victim appears to have fallen for him.

A missing person case turns suspicious when a well-liked Wausau, Wis., man doesn't show up for work one morning. Investigator Larry Woebbeking finds himself in an unexpected predicament when the girlfriend of the victim appears to have fallen for him.

Sacramento FBI Special Agent Jeff Rinek sought out the worst cases because he was the best at solving them. After being kidnapped at gunpoint from his family home, Rinek knows the chances of finding 7-month-old Frankie Proctor alive are slim to none.

Sacramento FBI Special Agent Jeff Rinek sought out the worst cases because he was the best at solving them. After being kidnapped at gunpoint from his family home, Rinek knows the chances of finding 7-month-old Frankie Proctor alive are slim to none.

Indianapolis detective Christine Mannina arrives on the scene of an execution-style shooting that's left one man dead and another in critical condition. She knows she must convince a reluctant witness to come forward and put her life on the line.

Indianapolis detective Christine Mannina arrives on the scene of an execution-style shooting that's left one man dead and another in critical condition. She knows she must convince a reluctant witness to come forward and put her life on the line.

One year into the most demanding case of his career, Riverside, Cal., senior investigator Bob Creed arrives at the scene of the 16th murder in a string of slayings. But this one is different. It's on his grandfather's property, where he spent most of his youth.

One year into the most demanding case of his career, Riverside, Cal., senior investigator Bob Creed arrives at the scene of the 16th murder in a string of slayings. But this one is different. It's on his grandfather's property, where he spent most of his youth.

Long-time partners and best friends, police detectives John Conaty and Ray Giacomelli never thought things would happen the way they did on a Pittsburg, Cal., murder case, where the prime suspect is a killer who was put behind bars years earlier.

Long-time partners and best friends, police detectives John Conaty and Ray Giacomelli never thought things would happen the way they did on a Pittsburg, Cal., murder case, where the prime suspect is a killer who was put behind bars years earlier.