No clear motive found for 2017 Las Vegas massacre: sheriff

(Reuters) - Police have uncovered no clear motive for the gunman who killed 58 people at outdoor concert in Las Vegas last year, in the deadliest mass shooting in modern U.S. history, a sheriff said on Friday.Stephen Paddock, 64, a retired real estate investor, poured gunfire from a sniper's nest in his 32nd-floor Mandalay Bay hotel suite into a crowd of more than 20,000 people attending a music festival in October 2017, then killed himself before police stormed his room.Las Vegas Metropolitan P