Anton Yelchin, a rising actor best known for playing Chekov in the new "Star Trek" films, was killed in a car accident early Sunday, police and his publicist said. Yelchin, 27, was struck by his own car as it rolled backward down his driveway in Studio City, according to Los Angeles police Officer Jenny Hosier. The car pinned Yelchin against a brick mailbox pillar and a security fence. He had gotten out of the vehicle momentarily, but police did not say why he was behind it when it started rolling. He was on his way to meet friends for a...