LAS VEGAS—The quest by police to comprehend why a retiree shot 58 people to death in Las Vegas has turned to the gunman’s girlfriend, who has flown back to the United States from the Philippines facing investigators’ questions about what she knew of his motives.
Stephen Paddock, who killed himself moments before police stormed the hotel suite he had transformed into a sniper’s nest on Sunday night, left no clear clues as to his reasons for staging the deadliest mass shooting in modern U.S. history.
