Police in Simi Valley are now investigating the background of a man killed by officers after a wild standoff. Detectives believe the man killed his mother, then opened fire on others in her neighborhood while fleeing on a tractor. Jane Yamamoto reports for the NBC4 News at 8 p.m. on Sunday, Aug. 25, 2013.
UP NEXT X
Wild Standoff Ends with Gunman Dead
Embed this video