Three officers discover that fighting crime alone can mean life or death.

A routine day morphs into a violent blur for two gravely injured officers.

A police officer's best friend is also a criminal's worst enemy.

Police negotiators have only one chance to turn a standoff into an arrest.

These dangerous high-speed police chases end in scary high-impact crashes.

Every officer dreads when the radio crackles those words, "Officer down!"

Be careful with whom you plot a murder - it might just be a cop.

Deputies try to remain cool when unhinged assailants are locked and loaded.

With death looming seconds away, officers race to save five innocent lives.

Armed criminals try to outgun, outmaneuver, and outsmart veteran officers.