The First 48 : Season 15

In the season premiere, an Atlanta woman is strangled and the investigation unearths more potential crimes.

Investigating a mass shooting in New Orleans.

A killer terrorizes Atlanta and investigators try to track him down.

When a young woman is executed on a street corner in Tulsa, investigator Nathan Schilling discovers her friends may be hiding information about the murder.

A violent attack in a Tulsa, Okla., barbershop leaves an employee dead and numerous people wounded; the hunt begins for a killer with an AK-47 assault rifle.

A welder has vanished under very suspicious circumstances and Tulsa homicide gets the case. Detective Matt Frazier and the rest of the team suspect foul play as they dive

Police must wade through a web of secrets and lies when a man is found dead in his Tulsa, Okla., hotel room.

When a popular New Orleans hip-hop promoter is gunned down next to his limousine, the search for the killer leads Detective Clinton Givens to more than he bargained for. In Tulsa, a friendly night of drinking at a senior center apartment complex leaves one man dead and another wounded. Detective Mark Kennedy must find a third man who was there to uncover what happened.

A New Orleans woman is found stabbed to death and stuffed in a trash bin the day before Thanksgiving; an Atlanta man's friend and girlfriend become suspects in the case of his fatal stabbing.

A young father is killed while visiting his son in Tulsa and a home invasion kills one teenager and leaves two more wounded in Atlanta.

A Tennessee family is attacked by a vicious home intruder; a rookie detective and his veteran partner probe the case of a severed head found in the Florida Everglades.

Veteran homicide Lt. Rick Zimmerman recalls the case of a woman and two young boys who were tortured before being brutally murdered.

A young New Orleans mother is found shot and burned in the trunk of her car following a night out on the town.

The case of a young New Orleans mother who was ambushed at home and fatally shot hinges on the eyewitness account of a 4-year-old girl.

A New Orleans father and his friends are ambushed while sitting in a parked car; a feud between households in an Atlanta apartment complex leads to the killing of a promising boxer.

An Atlanta man is gunned down in his home by an AK-47; the victim's wife holds a dark secret that could tear the family apart.

The target of a drive-by shooting in Tulsa, Okla., walks away from the attack, while his girlfriend is not so fortunate; police uncover a long-simmering feud as they hunt for the killer.

A Tulsa, Okla., detective hunts a family of elusive criminals after a former Marine is fatally shot while trying to recover his stolen bicycle.

In New Orleans, a transgender female is shot four times - the victim of an apparent robbery. In Atlanta, two men draw guns in an underground mall, but only one survives.

A double killing on New Orleans' Bourbon Street leaves the city on edge; Tulsa, Oklahoma, detectives believe that a shooting victim may have been lured into a trap.

A Tulsa, Okla., detective pieces together fragmented accounts from five potential witnesses as he investigates a crime involving a lethal combination of guns and meth.