Fifth Avenue in New York City was a moving sight on Friday as thousands of law enforcement officers gathered for the funeral of 22-year-old NYPD cop Jason Rivera. Rivera, who was posthumously promoted to detective during Friday’s service, was killed in the line of duty while responding to a call in Harlem last week.

Rivera’s partner Wilbert Mora also died following the ambush, after undergoing two surgeries and remaining on life support for four days. Mora, whose organ donations saved five lives, will be honored with a funeral next Wednesday.

Outside the funeral service for Rivera in St. Patrick’s Cathedral on Friday, law enforcement officers braved the snow to stand together in Rivera’s honor, filling Fifth Avenue in an awe-inspiring display.