Tamura was involuntarily held after being considered a danger to himself or others, according to a law-enforcement official.

One of the four victims gunned down by crazed Manhattan mass shooter Shane Tamura has been identified as a Cornell University grad who worked for the management company that owned the Midtown skyscraper,

A lone gunman opened fire at a Manhattan office tower that houses the NFL and Blackstone, killing four people.

Adams told reporters that investigators believe Shane Tamura of Las Vegas entered the building with the intent to reach the NFL 's offices but accessed the wrong set of elevator banks. "He seemed to have blamed the NFL ," Adams said. "The NFL headquarters was located in the building, and he mistakenly went up the wrong elevator bank."