July 4, 2013 12:06 pm Family Feared for Tierrasanta Victim's Safety We’re learning more about the Tierrasanta man police say is a suspect in his mother’s death. Joan Robinson, 78, was found dead on the kitchen floor of her home Tuesday. NBC 7’s Danya Bacchus reports. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks