Available records do not indicate what role the two played in the shooting. But prosecutors have said Vaughn, the gunman and another person were driving about 3:20p.m. July 12 when the gunman saw a rival gang member and told Vaughn he wanted to shoot the rival. Vaughn took a gun out of his car's center console, handed it to the shooter and said "wet that t-shirt up," meaning make the rival bleed, prosecutors have said.