The First 48 Presents: Critical Minutes

Tulsa detectives investigate the Neighborhood Crips to solve the murder of a young man trying to leave the gang.

In Atlanta, a young man comes home for lunch and winds up murdered when he catches a brazen thief in the act. Then, in Tulsa, an ongoing feud between two gang members leads to a fateful encounter.

In Gwinnett County, GA, a man is gunned down in the early hours of the morning on his front lawn, the engine of his truck still running behind him. Rookie Detective James Lawson has to unravel a tangled web of betrayal in order to find the killer.

In Tulsa, when a homeless man is killed after getting run over in a parking lot, detectives work to track down the elusive driver.

Tulsa Homicide responds when a father of three is gunned down at his job by suspects who end up in a standoff with police.

In Tulsa, a teenager is shot dead, and detectives must uncover the truth among his roommates' stories. In Mobile, a young man's murder sets off a retaliatory shooting.

Mobile detectives investigate the murder of a young mother of two and unravel the deadly plot that took her life.

A young man is shot dead in front of his mother's house. Mobile detectives look to his friends and family to find his killer.

In Tulsa, detectives question whether a young woman's death was a tragic mistake or murder. In Mobile, the murder of a young father tests a bond between brothers.

In Mobile, when two friends are found executed in a car on a dark, dead-end street, the investigation leads detectives to an unlikely suspect.

In Tulsa, when a shootout leaves a young man dead, the investigation leads to a woman from the victim's past. In Gwinnett County, GA, when a Marine veteran is shot, detectives must determine if a claim of self-defense is a cover for the truth.

Tulsa detectives need to find out if there is a link between the murders of a pregnant woman and a young man shot at the same apartment complex.

In Tulsa, after a man calls 911 claiming his girlfriend shot and killed herself, detectives discover evidence suggesting foul play.

In New Orleans, a car is set on fire in a desolate area. Inside, detectives make a gruesome discovery. Detective Ryan Vaught hopes the last person who spoke to the victim can lead him to the killer.

In Tulsa, a mother of five is killed after a roadside argument spins out of control. In Mobile, a security guard tries to keep the peace and ends up brutally murdered.

Tulsa homicide detectives must find a possible victim by getting her killer to lead the way; a young Mobile man is found shot in a car minutes after another man gets ambushed.

In Tulsa, when detectives investigate the murder of a man with a troubled past, they uncover a sinister plot.

In Tulsa, a father of three is gunned down after an argument, and the instincts of veteran detective Jason White are put to the test.

In Atlanta, a young man is shot dead in front of his friends after a bad deal. When a 15-year-old high school student is found on the stairs of an apartment filled with kids, witnesses must tell the truth so Tulsa Homicide can get to their shooter.

In Tulsa, a father is gunned down in broad daylight when an attempt to stand up for his cousin backfires. When an unidentified woman found shot and burned resembles a suspect in a recent home invasion, New Orleans detectives suspect a connection.

A St. Louis man is shot in his apartment with only his girlfriend with him, but she claims she had nothing to do with it.

A St. Louis man is shot in his apartment with only his girlfriend with him, but she claims she had nothing to do with it.