Overview

• Investigators have recovered a three-page note in which shooter Shane Tamura blamed the NFL for chronic traumatic encephalopathy and asked that his brain be studied after his suicide.
• Authorities are reviewing Tamura’s documented history of involuntary mental-health holds alongside the Nevada concealed-carry permit he held.
• Officials are tracing his cross-country drive from Las Vegas to New York City and examining how he transported an assault rifle into a Midtown Manhattan skyscraper.
• The fatal July 28 shooting at 345 Park Avenue killed four people—including off-duty NYPD Officer Didarul Islam—and wounded an NFL employee who remains in stable condition.
• New York City and federal agencies are coordinating support for victims’ families and assessing security protocols in high-rise office buildings.