The man who stormed a Manhattan office tower with a gun, killing four people before killing himself, worked in the surveillance department of a Las Vegas casino, part of an industry built on watching for threats before they unfold.
Shane Tamura, 27, didn't show up to work his usual shift Sunday at the Horseshoe Las Vegas. Instead, authorities say, he got in his car and drove across the country to carry out a mass shooting inside the skyscraper that houses the National Football League’s headquarters. A fifth person, an NFL employee, was wounded in the Monday attack.
