Former cornhole champion and quadruple amputee Dayton Webber had to “kill or be killed” when he allegedly fatally shot his pal, his defense lawyer claimed Monday — as the accused gunman with no limbs was indicted on first-degree murder charges. A Maryland grand jury handed down the murder indictment Friday, in addition to two counts of reckless endangerment and possession of a loaded handgun in a vehicle. Webber could face life behind bars if convicted. “We’re dealing with a homicide,” said