Los Angeles - An unarmed black man killed by Los Angeles police officers was shot three times, including once in the back at close range, according to his autopsy report released on Monday.The 11 August death of Ezell Ford is among a string of cases in the US this year in which black men have been killed by police officers under contentious and contested circumstances.The highly anticipated autopsy report, released by the Los Angeles County coroner's office, shows that Ford was shot once in the back, once in the arm and once in the abdomen.The wound to his back left a "muzzle imprint" on his skin, suggesting Ford was shot at very close range.Steven Lerman, the lawyer for Ford's family, decried the "horrifying" autopsy report."What they did to Mr Ford is nothing short of criminal," Lerman told AFP.Alone, unarmedFord, who was aged 25 and apparently suffered from mental illness, was killed during a confrontation with two patrol officers - Sharlton Wampler and Antonio Villegas - in southern Los Angeles.At the time of the incident, Ford was alone, unarmed, and walking on the sidewalk.The autopsy report does not provide a narrative of the shooting, but the Los Angeles Police Department says the incident unfolded with Wampler and Villegas attempting to talk to Ford. He walked away, however, and was "attempting to conceal his hands".The officers followed Ford and as one of them tried to grab him, "Ford grabbed the officer's handgun and attempted to remove the gun from its holster," according to an LAPD statement."The officer yelled out to his partner that Mr Ford had his gun. The officer's partner then fired two rounds striking Mr Ford. At about the same time, the officer on the ground while on his back grabbed his backup weapon, reached around Mr Ford and fired one shot at close range striking Mr Ford in the back."Call for district attorney reviewDuring a press conference Monday, Los Angeles police Chief Charlie Beck said "there is nothing in the coroner's report that is inconsistent with the version the officer has given.""The officer drew his backup gun and... shot Mr Ford in very close proximity, probably causing the muzzle imprint mentioned in the coroner's report," Beck said.Beck cautioned that the investigation would take several months to complete. Ford's family and witnesses cited by local media deny that Ford had been aggressive.The autopsy was published only after residents complained of a lack of transparency in police investigations and Mayor Eric Garcetti promised to publish it by the end of the year.