In a video message, Tisch said Tamura left a suicide note and claimed to be suffering from chronic traumatic encephalopathy (CTE), possibly from playing high school football. Tamura also blamed the NFL and asked that his brain be studied for signs of the degenerative disease.

The Park Avenue shooter’s high school football coach said Tuesday that he doesn’t recall Shane Tamura suffering anything more than an ankle injury during his senior year on the gridiron.

Wearing body armor and wielding an assault-style rifle, the alleged gunman burst into a Midtown Manhattan office building shooting victims at random.