Prude died of asphyxiation after a group of police officers put a hood over his head, then pressed his face into the pavement for two minutes while he was handcuffed and naked.
He passed away March 30 after he was taken off life support, seven days after the encounter with police in Rochester.
His death received no public attention until Wednesday, when his family held a news conference and released the police body camera video and written reports they obtained through a public records request.
Protesters gathered in Times Square on Thursday evening for a second straight day, chanting Prude's name as speakers shouted: "Say his name!"
A group of protesters also gathered outside Rochester’s Public Safety Building on Exchange Boulevard to protest police brutality. Demonstrators were sitting, singing, chanting slogans.