The First 48 Presents: Critical Minutes

Detectives Mike McCleery and Bob Bachelder investigate the murder of a promising high school senior, shot to death the week before Christmas and stuffed in the trunk of his car, 25 miles from home.

In New Orleans, when a young mother is found beaten to death in her home, Detective Greg Johnson must fight to prove he has enough evidence against her killer, before he walks free.

Broad Daylight: Detective Travis Ward must find a willing witness to a New Orleans woman's murder before her killer strikes again.

New Orleans Detective Ryan Vaught takes on his most challenging case yet when a young married couple goes missing and one of them is found floating in a river, drowned to death.

After a number of women are murdered in East Cleveland, residents fear a serial killer may be on the loose. When a grandmother is strangled and left to die Detectives Bob Ford and Tom Armelli need to find out if her killing is related to the others.

Detectives discover a house of horrors during their investigation into the fatal slashing of a New Orleans woman.

In New Orleans, when a young father is abducted and shot in the street, detective Rayell Johnson hopes shocking surveillance footage can help him crack his first homicide case.

In Atlanta, two men are ambushed at gunpoint and only one survives to tell the tale. A mother is found stabbed to death on the side of the road, but a wedding ring dropped at the scene could break the case.

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.

When a stray shot leaves an innocent man dead in his home, Tulsa detectives discover a neighbourhood under siege by young terrors. They race to track down the killers before more blood is shed.

When a Tulsa man is gunned down at the wheel of his car, detectives turn to a passenger who saw it all. A 20-year-old man in New Orleans is shot down minutes after his mother gets a warning about the murder.

In Atlanta, a man is shot to death over a gambling dispute at an illegal after-hours club. Detective Kevin Otts battles against a wall of silence as he tries to track down the killer. In Tulsa, two young lovers are murdered in cold blood.

In Cleveland, a young father is murdered in his car and detectives discover his friend may know who pulled the trigger. In Tulsa, the homicide team goes on the hunt for a shotgun-wielding killer who tore a family apart.

When an innocent father is brutally stabbed, Tulsa Detective Justin Ritter delves into the dark and dangerous world of methamphetamine addiction in order to stop a killer on the edge.