Wild crash and act of heroism captured on camera

GRANDVIEW, MO -- We see police chases all the time, but one in Missouri took an unexpected turn and now an officer is being hailed as a hero.

It all started out as a traffic stop, but the driver sped away. A short time later, dash cam video shows the driver losing control of his car and then rolling it several times.

Then the officer chasing the man runs over, starts CPR and saves the man's life! He was taken to the hospital and is expected to survive.