A funeral was held Thursday for NYPD Det. Didarul Islam, one of the victims killed in Monday's shooting at a Midtown office building.

Roughly 15,000 mourners gathered for the funeral of NYPD Officer Didarul Islam, who was killed in an office building shooting while working an off-duty security detail.

Islam, 36, has been hailed since his death as a doting father, a generous neighbor and a shining example of the best of the NYPD. An immigrant from Bangladesh, he was a four-year veteran of the force, and a married father of two young boys. His wife is due with their third child next month. Islam will be laid to rest in New Jersey.