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

In Mobile, when a quick money scam ends in a double murder, a rookie homicide detective takes it personally.

A Tulsa, Okla., police detective tracks a sadistic killer who murdered the brother of a man who stole his truck.

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

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.

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

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

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.

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.

A father is killed when a man opens fire in a crowded convenience store in Atlanta; a Tulsa, Okla., groom-to-be is gunned down before he can turn his life around.

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.

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; a young man's future is cut short when a plan to make a quick buck goes horribly wrong.

A late-night shooting in North Minneapolis leaves one man dead and another alive to help detectives identify the killer. In Tulsa, a late night party turns into a blood bath, but a Facebook video may help Detective John Brown dispute a suspect’s claims that he wasn’t there. In Tulsa again, Detectives must decide if a duo responsible for an all night car-jacking spree ended in the gruesome murder of a single father. In Tulsa, an innocent victim is caught in the cross fire as a surge of gang violence rips through the city.

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 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 star witness identifies her boyfriend’s killers, detectives suspect it may be too good to be true. After two young men are killed, Detective Nick Williams tries to get their friend to change his ways before he becomes another victim. A teenager tells Tulsa homicide that his friend accidentally shot himself, but the evidence points in another direction. In Mobile, when a homeless man is brutally murdered, detectives conclude that it’s not just a random act of violence but something much more personal.

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.

Detectives investigate the double murder of two family men in Minneapolis, urging a witness to come clean; in Tulsa, Okla., a young woman is found dead in a dumpster after she discovers the fate of her fiancé.

After a generous Atlanta man is murdered, Detective Egbert suspects he may have been a victim of his own kindness; in Tulsa, Okla., a man is shot while driving down the street; Sgt. Walker questions youths who tried to break into the victim's house.

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

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

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 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 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.

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

Tulsa Ok. Detective Jason White continues to investigate Courtney Palmers disappearance. The missing persons case turns into a detective's worst nightmare