Manhattan Tragedy: The Complex Web Behind a Deadly Rampage
Shane Tamura, 27, killed four people at a Manhattan office building before taking his own life. Claiming to suffer from CTE, he accused the NFL of hiding the risks of brain injuries in contact sports. Tamura bought the rifle from his supervisor at a Las Vegas casino.

In a shocking incident that left Manhattan reeling, Shane Tamura, 27, launched a fatal attack that resulted in the deaths of four individuals before he took his own life. The tragedy unfolded at a building housing the NFL headquarters, where Tamura blamed contact sports for causing him chronic traumatic encephalopathy (CTE).
Authorities revealed that Tamura had acquired the AR-15-style rifle used in the attack from his supervisor at a Las Vegas casino. Controversy surrounds the legality of the purchase as Tamura had a history of mental illness and previous run-ins with the law. His connections to the casino and its staff are under investigation.
In the aftermath, detectives are combing through Tamura's Las Vegas apartment and casino locker for further clues. The tragic event has left families mourning, with the funerals of victims Didarul Islam and Julia Hyman taking place amid an outpouring of grief and confusion.
(With inputs from agencies.)