What we know about Shane Tamura, the alleged gunman now dead in NYC shooting

A deadly shooting on Manhattan's Park Avenue claimed four lives, including an NYPD officer, before the gunman fatally shot himself. Authorities identified the shooter as 27-year-old Shane Devon Tamura from Las Vegas. Tamura, armed with an AR-15-style rifle, opened fire inside a building housing corporate offices. While a motive remains unclear, speculation links it to Tamura's alleged NFL aspirations.