In Ohio, a murder tears a family apart and puts a SWAT team in a line of fire; in Washington, a car chase has an officer in a life or death situation; and in Texas; a collision between a car and a train could have fatal consequences.

In Colorado, A hostage situation threatens to spiral into a multiple killing; and in Florida, a gas station robbery quickly turns into a manhunt. And leaves some officer fighting for his life.

In Maryland, police face off against a shooter; in California, a deadly race against the clock; and in Ohio, officers rush into an inferno to save a trapped woman.

In Maryland, a traffic stop explodes into chaos; in Ohio, a suspect is on the run; and in Texas, a wanted criminal won't go down without a fight.

In Florida, a man is shot dead near a retirement community. Investigators struggle to find a motive. The evidence points to a twist like no other; in Oklahoma teen fugitives take police on a high-speed chase that takes a horrific turn.

In Florida, an undercover agent is closing a drug deal when the suspects suddenly turn on him; in Texas, a young mother and her children are engulfed by rising flood waters; and in Ohio, a stolen truck leads a terrifying chase.

In Washington State, a late night chase ends with a K9's life on the line; in Florida, a drowning infant battles to survive; and in Ohio, officers race through downtown Columbus in pursuit of their own hijacked police cruiser.

In Indiana, an armed gunman is on the loose; in Ohio, a shoplifter with a taser will do anything to get away; and in Kentucky, a routine arrest leaves an officer fighting for his life.

In Colorado, a terrifying home invasion leads to a car chase and gunfight with police, resulting in a fatality. In New Mexico, a known criminal holds up a convenience store and then takes officers on a life-threatening car chase.