New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office building at 345 Park Ave.

NYPD Officer Didarul Islam, the police officer gunned down in a Midtown Manhattan mass shooting inside a Park Ave. office building, was posthumously promoted to detective first grade during his funeral Thursday as a sea of mourners,

The death of NYPD officer Didarul Islam, the first Bangladeshi-born officer killed in the line of duty, has deeply impacted his community in the Bronx. Islam was more than an officer; he was a hero, a living symbol of hope,