An Arizona mother triggers a desperate search for her son, who is armed and suicidal; an Ohio officer fights for his life when a suspect overpowers him; a Wisconsin man shoots his co-workers and police must find him to stop the threat.

A suspected drug dealer in Georgia won't go down without a fight; police in Ohio fear for their lives when faced with an ambush from a hidden gunman; after a high-speed chase, a fleeing driver has one more surprise for Macomb County Deputies.