Body Cam: On the Scene

Three officers face down violent criminals alone; a killer on the run ambushes a State Trooper; a rookie's routine stop on the highway takes a dangerous turn; and a disturbance at a liquor store leaves an officer fighting for his life.

Police risk their lives in the line of duty; In Uniontown, Ohio, a domestic disturbance spins out of control leaving an officer in a critical condition; In Kentucky, a routine traffic stop turns violent as the suspect makes a dangerous getaway.

A K9 hunts down a dangerous driver but goes missing, leaving his handler desperately searching for him. A suspect is tracked through a dangerous swamp. And following a car chase, a man is outsmarted by a K9 Officer.

In Ohio, a police negotiator desperately tries to talk down a man who is threatening to harm himself and his family. A knife-wielding ex-boyfriend is in a standoff with police before drawing them into a dangerous foot chase.

A dangerous felon steals a dump truck and will ram anything in his path. A chase escalates to a gruesome conclusion, and Oklahoma City officers fear an ambush when a suspect bails from a stolen pick-up after a high-speed chase.

An officer's life changes when he comes face to face with an armed suspect. Police are hunting two wanted men, responsible for a string of armed robberies. A routine traffic stop results in an officer being shot and fighting for his life.

Police uncover criminals with murder on their minds, and an undercover cop foils a double murder-for-hire plot. Then, an apparent vehicle accident turns into a shocking multiple murder, and police set a trap for a would-be killer.

In Florida, Deputies come under intense fire from a gunman holding his own family hostage. In Colorado, a dispute between roommates escalates into a deadly siege when two Deputies are trapped with a gun-wielding suspect.

In Fullerton, CA, police race to save a therapist from a knife-wielding former patient. In Florida, officers must talk a mother high on drugs with her two small children off a ledge. Ohio police respond to a deadly break-in by an ex-boyfriend.

After luring Albuquerque police to his location, a man with an AK-47 ambushes the officers and leads them on a dangerous 16-mile citywide chase in a stolen cop car. In Oklahoma, officers find themselves cornered by a wanted felon.