India, July 29 -- A former classmate of Manhattan shooter Shane Tamura has described him as the "biggest goofball" and a person who had a lot of potential. Tamura, 27, opened fire today inside 345 Park Avenue - a Midtown highrise that houses the offices of Blackstone, KPMG, and NFL, among others. At least four people, including an off-duty NYPD police officer, were killed in the shooting.

Tamura, a Las Vegas native, was later found dead from a self-inflicted gunshot wound, NYPD Commissioner Jessica Tisch revealed in a news conference.

CNN, citing law enforcement, said that Tamura had been a football player in his youth. He moved from Hawaii to Los Angeles. This account was corroborated by his former classmate Caleb Clarke in an intervie...