Jose (Kiko) Garcia July 3, 1992 During a struggle with police officers in the lobby of an apartment building, Mr. Garcia, a 23-year-old Dominican immigrant who the police said was carrying a revolver, was shot twice by Officer Michael O’Keefe. What happened: Later that year, a grand jury cleared Officer O’Keefe, supporting the officer’s assertion that Mr. Garcia reached for a gun before he was shot.

Ernest Sayon April 29, 1994 Mr. Sayon, 22, was standing outside a Staten Island housing complex when police officers on an anti-drug patrol tried to arrest him. Mr. Sayon suffocated because of pressure on his back, chest and neck while he was handcuffed on the ground. What happened: A grand jury declined to file criminal charges against any of the three police officers involved, apparently concluding that the officers had used reasonable force in subduing Mr. Sayon.

Nicholas Heyward Jr. Sept. 27, 1994 Nicholas, 13, was playing cops and robbers with friends in a Gowanus Houses building stairwell when Officer Brian George, mistaking the teenager’s toy rifle for a real gun, shot him to death. What happened: The Brooklyn district attorney decided not to present the case to a grand jury, saying the real culprit was an authentic-looking toy gun.

Anthony Baez Dec. 22, 1994 Mr. Baez, 29, a security guard, was playing football outside his mother’s Bronx home when a stray toss landed on a police car. Mr. Baez died after an officer applied a chokehold while trying to arrest him. What happened: Francis X. Livoti, who had been dismissed by the force for using an illegal chokehold, was convicted on federal civil rights charges and sentenced to seven and a half years in prison, two years after he won acquittal in a state trial.

Amadou Diallo Feb. 4, 1999 Mr. Diallo, a 22-year-old immigrant from Guinea, was killed by four officers who fired 41 times in the vestibule of his apartment building in the Bronx. They said he seemed to have a gun, but he was unarmed. What happened: In February 2000, after a tense and racially charged trial, all four officers, who were white, were acquitted of second-degree murder and other charges, fueling protests. The city agreed to pay the family $3 million.

Patrick Dorismond March 16, 2000 Mr. Dorismond, 26, an unarmed black security guard, was shot dead by an undercover narcotics detective in a brawl in front of a bar in Midtown Manhattan, after Mr. Dorismond became offended when the detective asked him if he had any crack cocaine. What happened: By late July, a grand jury declined to file criminal charges against the detective, Anthony Vasquez, concluding that the shooting of Mr. Dorismond was not intentional. The city agreed to pay $2.25 million to his family.

Ousmane Zongo May 23, 2003 Mr. Zongo, 43, an art restorer, was shot and killed by a police officer during a raid at a Chelsea warehouse that the police believed was the base of a CD counterfeiting operation. What happened: In 2005, Officer Bryan A. Conroy was convicted at the second of two trials and sentenced to probation. The judge placed the blame for the killing primarily on the poor training and supervision by the Police Department. The city agreed to pay the family $3 million.

Sean Bell Nov. 25, 2006 Five detectives fired 50 times into a car occupied by Mr. Bell, 23, and two others after a confrontation outside a Queens club on Mr. Bell’s wedding day. He was killed. What happened: After a heated seven-week nonjury trial in 2008, the judge found Detectives Gescard F. Isnora, Michael Oliver and Marc Cooper not guilty of all charges, which included manslaughter and assault. In 2012, Detective Isnora was fired, and Detectives Cooper and Oliver, along with a supervisor, were forced to resign. The city agreed to pay the family $3.25 million.

Ramarley Graham Feb. 2, 2012 Mr. Graham, 18, was shot and killed by Richard Haste, a police officer, in the bathroom of his Bronx apartment after being pursued into his home by a team of officers from a plainclothes street narcotics unit. Mr. Graham was unarmed. What happened: A grand jury voted to indict Officer Haste on charges of first- and second-degree manslaughter, but a judge dismissed the indictment a year later. Prosecutors sought a new indictment. In August 2013, a grand jury decided not to bring charges in the case. The city agreed to pay the family $3.9 million.

Eric Garner July 17, 2014 Mr. Garner, 43, died after Officer Daniel Pantaleo restrained him using a chokehold, a maneuver that was banned by the New York Police Department more than 20 years ago. The officers were trying to arrest Mr. Garner, whose death was attributed in part to the chokehold, on charges of illegally selling cigarettes. What happened: A grand jury, impaneled in September by the Staten Island district attorney, voted not to bring criminal charges against Officer Pantaleo. The city agreed to pay the family $5.9 million.