Police: 11-Year-Old Shoots, Kills Teen Intruder 0 By KMAN Staff on September 4, 2015 AssociatedPress, Video Police in St. Louis County, Missouri say an 11-year-old boy shot and killed a 16-year-old boy who was trying to break into his home. Police say the younger boy used a gun that his mother apparently bought because of other break-in attempts.