Houston Tumlin has died. The 28-year-old took his own life at his home in Pelham, Alabama. While his girlfriend was there when it happened, there was no note found. Houston was best known for playing Walker Bobby, the foul-mouthed 10-year-old son of Ricky Bobby, in “Talladega Nights: The Ballad of Ricky Bobby.” The film’s director, Adam McKay, is “heartbroken and stunned” over the death of the kid he remembered as a “joyful and talented person.”