NFL Commissioner Roger Goodell revealed one employee was hospitalized after a shooting at the league's headquarters in Manhattan left five dead before the gunman took his own life.

The mayor of New York says Shane Devon Tamura may have been targeting the headquarters of the NFL when he opened fire at a skyscraper in midtown Manhattan. A three page suicide note found in Tamura’s wallet and reviewed by NBC News contains several references to the degenerative brain disease CTE,