Tamura’s past includes two involuntary psychiatric holds and a citation for misdemeanor trespassing by Las Vegas police in 2023. None of those encounters legally barred him from purchasing a firearm.

Police are retracing Tamura's movements from Nevada to New York after a Midtown Manhattan shooting that left four people dead ...

The New York City Medical Examiner determined a cause and manner of death for the gunman who killed four people inside a ...

The Palmetto State Armory M4 assault rifle used in the shooting that killed an NYPD cop and three civilians is .223-caliber ...

One theory is that Tamura went dark on social media or cut ties with certain people. His behavior back then may have been a sign of the decline in mental health that culminated in Monday’s shooting, ...

NYPD said the gunman purchased the fully-assembled AR 15-style rifle used in the shooting from his supervisor.

Authorities also found a vehicle with Nevada plates registered to Tamura at the scene, with a rifle case inside, sources said.