An eight-year-old girl is discovered strangled to death in Ocean Shores, Wash. and investigators embark on a search to find her killer.

A night out for a young woman ends with her murder, and her killer is able to stay on the run from police, outsmarting law enforcement for decades.

A former actor is found shot dead Arizona, and police now have to begin a manhunt for the killer throughout the southwestern part of the United States.

Police arrest a person who is responsible for killing a businessman, but when police discover that he is a contract killer, they know the case just started.

A mother of two is shot to death outside her apartment complex just minutes after returning home and Detective Waters uncovers a shocking lead caught on video.

After a mother is strangled to death in her bedroom while her son sleeps, and Detective Fil learns that the victim's own mother was murdered 25-years earlier.

When a 12-year-old boy is abducted on Christmas Eve, a detective learns this was not the first time he went missing and will stop at nothing to solve the case.

Fil Waters investigates when three members of a tight-knit family are brutally murdered in broad daylight while working at their family owned car dealership.

In Georgia, officers find a car in a ditch with no sign of the driver, Aaron Davis, who was last seen with his best friend Brandon. Brandon seems cooperative.

In Indiana, a possible murder-kidnapping leads Evansville Police into an armed standoff with a suspect barricaded inside a house.

In Arizona, a police officer and firefighter respond to a serious vehicle collision; in Florida, police pursue a suspect who chooses an unexpected escape route.

Oceanside police hunt down a violent criminal after a brutal domestic shooting; a reckless driver hurtles towards thousands of runners.

Police must save the lives of 2 women as their machete-wielding attacker leads officers on a dangerous pursuit; a winter storm causes a multivehicle pile-up.

In Colorado, a driver opens fire and sparks a high-speed pursuit that ends with a dramatic standoff; in Ohio, a man ignites a fierce gun battle with police.

Lt. Mike Daniewicz must take to the streets of New Jersey's Little India to catch a killer whose desperation is matched only by his heartlessness.

When investigators find a series of homeless men bludgeoned to death at the same intersection, Las Vegas fears who could be next.

A gunman shoots a hero fireman dead in his own driveway. Police focus their investigation on the unusual firearm used to commit the crime.

A terrifying witness account may lead a small-town police department in the wrong direction, as they try to solve the murder of their friend.