In Cleveland, a young mother walking alone to work is viciously murdered and dumped in an abandoned house.

Tulsa homicide delves into a dark world of drugs and prostitution to solve the murder of a man executed in his car in a motel parking lot.

In New Orleans, when a woman is slashed to death, the investigation into her murder leads Detectives Chuck Ward and Rob Barrere to a house of horrors, and they discover the killer may be someone they least expected.

In Memphis, Lt. Toney Armstrong and his team respond to Memphis's worst mass murder in more than 15 years, where they find four adults and two children dead -- a possible gang-ordered directive.

When a young father is ambushed by a pack of brazen shooters, Atlanta Detective Summer Benton uncovers the shocking reason for his murder.

In New Orleans, a young mother is ambushed at home and shot at close range. Detective Rob Barrere's case depends solely on the eyewitness account of a four-year-old girl and leads to another brutal death.