Crime scene tape surrounds the Mandalay Hotel in Las Vegas after a gunman in one of its rooms killed at least 58 people, with more than 500 others injured, when he opened fire on a country music concert late Sunday. » Crime scene tape surrounds the Mandalay Hotel in Las Vegas after a gunman in one of its rooms killed at least 58 people, with more than 500 others injured, when he opened fire on a country music concert late Sunday.