Nation FBI: Mandalay Bay shooter in Las Vegas who killed 58 was angry about how casinos treated him March 30, 2023 Tami Abdollah, USA TODAY Comments Off on FBI: Mandalay Bay shooter in Las Vegas who killed 58 was angry about how casinos treated him Stephen Paddock, 64, killed dozens from his 32nd-floor suite at the Mandalay Bay Resort & Casino before killing himself.