Nevada's gun laws are again under scrutiny after a Las Vegas man opened fire in Midtown Manhattan, killing four people and injuring another.

Investigators discovered a second note at the Las Vegas home of the gunman who killed four people in midtown Manhattan, officials said. The note mirrors the one found on his body in New York, where he blamed football for his mental illness as authorities examine his brain for signs of CTE.

Walter Roby, who coached Tamura during his senior year at Granada Hills, told Fox 11 Tamura was quiet and a top offensive player on the team who worked hard and did what his coaches asked of him. Roby said the shooting has him reflecting on his time coaching Tamura.