Watch The First 48

In Charlotte, rookie Detective Norma McKee gets her first double murder: a young couple shot in their car by a backseat passenger. Inside the vehicle, detectives find what may be a vital clue, a baseball hat that might contain the suspect's DNA. In Birmingham, Detective Chris Anderson investigates the gruesome murder of a woman who is shot to death and then set on fire. Anderson hunts down his suspects, but it's the victim's family that reveals a final, disturbing twist in the case.

A Tulsa, Okla., man is murdered in front of his fiancee when death comes knocking at their door; a beloved man is gunned down while protecting his friends from a shooter's rage.

In Atlanta, a teenager is killed when he steps in front of a gunman to save his friend; in Tulsa, Okla., a man is shot dead and left in a church parking lot when he tries to sell a stolen car.

In Harris County, a woman is found bound by the side of the road. As Sgt. James Dousay works the case, he discovers that he may be looking for a serial killer.

In Tulsa, an innocent grandmother is gunned down steps from her front door, and Detective John Brown discovers that her killers may be 14-year-old boys.

In Tulsa, an unsolved case comes to life when new evidence sheds light on a dead man’s friend.

In Tulsa, a high-school football player is gunned down when his friends make a dangerous decision. Detectives must separate witnesses from suspects to find out who fired the fatal bullet.

In Atlanta, a teenager’s life is cut short over a neighborhood beef. In Tulsa, a young woman goes missing and her family fears she was murdered.

In Tulsa, when a man driving down the street is gunned down, Sgt. Dave Walker questions local youths who tried to break into the victim’s house. A generous Atlanta man is murdered in his home, and Detective John Egbert suspects he may be a victim of his own kindness.

In 2008, an intruder savagely attacks a family in their Memphis home, leaving bloody clues that partners Tony Mullins and Caroline Mason must piece together in pursuit of the killer.

When a young mother and her friend are murdered in front of her children, Tulsa detectives hope a suspicious vehicle will lead them to the killer.

In Minneapolis, surveillance cameras at a convenience store capture more than just a shooting. When a dead body is found days after the murder, Minneapolis Homicide must scramble to catch up to the killer. Minneapolis detectives need the help of the Somali community to help solve the murder of one of their own. The life of a 19-year old woman hangs in the balance after walking in on an intruder in her home.

In New Orleans, when a man is robbed and shot multiple times on his payday, Detective Rob Barrere has a hunch this isn’t just a random robbery gone wrong. In New Orleans, when an eyewitness points out a potential suspect at the crime scene, Detective Nick Williams must determine if they have the right guy. When a man is found shot dead in his car, St. Louis detectives hope a local prostitute can point them in the direction of the shooter. In KCK, a feud between neighbors gets out of control and leaves a father of 5 shot in the head on his doorstep.

In Mobile, when a 90-year-old war hero is shot in the back, detectives discover his former neighbor may hold the key to what went down. In Tulsa, a young man’s future is cut short when a plan to make a quick buck goes horribly wrong.

In Atlanta, when a young man is shot from 235 feet away, Detective Darrin Smith discovers an escalating feud that threatens to tear apart a neighborhood.

In Tulsa, a man from out of town is found dead in his motel room and Detective Michael Zenoni must wade through a web of secrets and lies to uncover the truth.

A parking lot drug deal turns into a shootout that claims the lives of two Atlanta men; an execution outside a Tulsa, Okla., motel escalates into a double murder when the killer spots a witness to the crime.

Gunmen open fire on a porch, shooting four children and three adults; a police detective turns to the New Orleans community for help in solving the case.

In Tulsa, a man shot and killed when a stranger sees an opportunity to good to pass up. In Atlanta, an escalating argument ends with one man dead and the other in danger.

When a man is murdered just before Christmas, his family helps Tulsa, Okla., detectives search for his killers.

A woman is beaten and stabbed to death in her home in an act of vengeance; a Kansas City man is unable to get out of a dangerous business.

A father gone missing turns up dead when his plans to evict a tenant ignite a murderous rage.

In Tulsa, Detective Leatherman tracks a sadistic killer who murdered the brother of a man who stole his truck.

A quick-money scam in Mobile, Ala., ends in a double murder; a rookie homicide detective takes the case personally.

In Atlanta, a decorated veteran and grandfather is ambushed when he checks on a rental property.