The NYTimes published a list of some notable and notorious incidents of NYPD violence against black men.  Obviously, this is not an exhaustive list.  All but one of the men were killed, the one that wasn't was sodomized with a broken broomstick.  All of the men were unarmed.

They are:

August 1997: Haitian immigrant Abner Louima is arrested after a nightclub brawl, taken by officers to a jailhouse, and sodomized with a broken broomstick. One officer pleads guilty and is sentenced to a 30-year term; another gets a five-year term. Louima won an $8.75 million settlement with the city.

February 1999: Unarmed African immigrant Amadou Diallo is shot to death at the front door of his Bronx apartment building by four officers who said he fit the description of a rape suspect and they mistook his wallet for a gun. Diallo was hit by 19 of the 41 shots fired; the officers were acquitted of criminal charges in a 2000 trial. Diallo's mother got a $3 million settlement.

March 2000: Patrick Dorismond, an unarmed black security guard, is shot to death by an undercover narcotic detective during a scuffle in Manhattan. A grand jury cleared the officer of wrongdoing; the city paid $2.25 million to Dorismond's family.

May 2003: Unarmed African immigrant Ousmane Zongo is fatally shot in a warehouse by a policeman helping to investigate counterfeit CDs and DVDs. Zongo had no connection to that case. The officer was spared a prison sentence, receiving five years' probation and 500 hours of community service. Zongo's family got a $3 million settlement.

January 2004: Timothy Stansbury, a 19-year-old, unarmed black man, is fatally shot by an officer apparently startled by their sudden encounter on the roof of a Brooklyn housing project. The officer was cleared of all charges.

November 2006: Sean Bell, a 23-year-old unarmed black man, is shot to death, and two unarmed companions wounded, by undercover officers on duty at a strip club in Queens. The men had been at Bell's bachelor party; he was to have been married later in the day. The case is under investigation.