Vegas man storms NFL’s NYC office, sparking deadly chaos.
Four killed in seconds: guard, exec, cop, and young pro.
Wrong elevator saves NFL staff from worse fate.
Cleaner hides, prays as bullets tear through closet door.
Medical report: Gunman had CTE from high school football.
His brain trauma wasn’t from NFL, but amateur games.
Note in pocket slams NFL for hiding concussion risks.
His plea: “Study my brain, I’m sorry.” Chilling words.
NFL mourns, says CTE science still a big question mark.
Football’s brain toll needs action—lives are at stake.