A young mother and her best friend gunned down in broad daylight sets off a chain of events that Tulsa Homicide never could have imagined.

When a young man and his pregnant fiance are executed after a failed ransom attempt, Atlanta Homicide will stop at nothing to identify the elusive suspect.

In Tulsa, detectives struggle to find a lead when a beloved grandfather is gunned down in his own home.

In Mobile, a 21-year-old woman is shot dead in her hotel room by a mysterious visitor.

In Atlanta, when a young father is found dead in his home by his girlfriend, detectives track down the killer and find things are not as they appear.

In Tulsa, a father of three is gunned down in front of his family during a deadly crime spree. Detectives race to track down his killer before anyone else gets hurt.

In Tulsa, a homeless man is beaten and stabbed to death, leading detectives to witnesses that live under the bridge where he was discovered.

In Tulsa, detectives have little to go on when they find the naked body of an unknown homeless woman who was raped, strangled to death, and thrown into a dumpster.

A young woman in Mobile is found dead behind an abandoned building, and detectives need her boyfriend to help solve the case. A young father's murder case sends Atlanta detectives to the Poconos Mountains in search of his killers.

In Tulsa, two brothers are shot down after checking on their night cleaning crew. Detectives struggle to find a motive before the killer strikes again.

In Tulsa, a father is gunned down in a parking lot by a killer lying in wait. In Mobile, an elderly man dies from a suspicious fire in his apartment.

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.

When a man is found shot dead in his driveway, an abandoned truck leads Tulsa Homicide to several potential suspects, but not everything is as it seems.

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

A young man is gunned down at a troubled apartment complex that comes under federal investigation after a rap video goes viral.

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

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.

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 late night shootout leaves a young man dead, the investigation leads to a woman from his past. When a Marine veteran is shot, detectives must determine if a claim of self-defense is a cover for the truth.

A mother is stabbed to death and Gwinnett detectives must find her missing son who might be the only witness. Tulsa detectives need to find out if there is a link between the murders of a pregnant woman and a young man.

In Atlanta, a 23-year-old man is shot dead in front of his friends after a bad deal. In Tulsa, a 15-year-old high school student is found on the stairs of an apartment filled with kids.

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. Det. Ryan Vaught hopes the last person who spoke to the victim can lead him to the killer.