Law enforcement officials said Shane Tamura, the Las Vegas man suspected of killing four people on July 28 in a Manhattan office building, had a documented mental health history, raising questions about why he had access to guns.
Police said Tamura, 27, fired an M4 rifle in the building that houses the NFL headquarters, killing four people, including a police officer working a corporate security detail, and then himself. News reports said Tamura, a former high school football player, had a note that said he had CTE, or chronic traumatic encephalopathy, which is associated with head injury.
