Investigators are combing through evidence in the wake of New York City’s deadliest mass shooting since 2000, trying to figure out more about the gunman who unleashed an assault-style rifle in Midtown,

Four people were killed in a shooting Monday evening inside a New York City office building. The gunman, who used a high-powered rifle to open fire in the Midtown Manhattan skyscraper, later died of a self-inflicted gunshot wound,

Tamura worked as a surveillance department employee at the Horseshoe hotel and casino in Las Vegas, a spokesperson for the Horseshoe said on Tuesday. Several squad cars from the Las Vegas Metro Police were seen at the entrances to a gated neighborhood where Tamura was believed to have lived.