Police have identified the man who they say entered a Midtown Manhattan office building wearing body armor and opened fire, killing four people with a high-powered rifle, as Shane Devon Tamura.

Shane Tamura, the gunman who killed an NYPD officer and three civilians before taking his own life inside a Midtown Manhattan Park Avenue skyscraper, left a second suicide note behind in his Las Vegas home,

The gunman in Monday’s mass shooting in Midtown had bottles of antipsychotic medication in his Las Vegas studio apartment, police said after executing a search warrant. Police said Shane Tamura, 27, killed four people Monday,