A former police officer has been convicted of murder in the shooting of Andre Hill, a black man who was holding a mobile phone and keys when he was killed.

Officer Adam Coy, who served nearly 20 years with the Columbus police force, shot Mr Hill four times in a garage nearly four years ago.

Coy, who is white, was fired after the shooting. He later told jurors that he thought Mr Hill was holding a silver revolver.

“I thought I was going to die,” he testified. It was only after he rolled over Mr Hill’s body and saw the keys that he realised there was no gun, Coy said.

“I knew at that point I made a mistake. I was horrified.”

Police body camera footage showed Mr Hill coming out of the garage of a friend’s house holding up a phone in his left hand, his right hand not visible, seconds before he was fatally shot by Coy.

Almost 10 minutes passed before officers at the scene began to aid Mr Hill, who lay bleeding on the garage floor. He was pronounced dead at a hospital.

Weeks after the December 2020 shooting, the mayor forced out the police chief after a series of fatal police shootings of black men and children.

Columbus later reached a 10 million dollars settlement with Mr Hill’s family, the largest in city history.

The Columbus City Council also passed Andre’s Law, which requires police officers to render immediate medical attention to an injured suspect.

Prosecutors said Mr Hill, 47, had followed the officer’s commands and was never a threat to Coy, who now faces at least 15 years in prison.

“We’re taught do what the cops tell you to do and you can survive that encounter,” Franklin County assistant prosecutor Anthony Pierson said during closing arguments.

“That’s not what happened here.”

The officer’s lawyers argued that Mr Hill’s lack of a weapon did not matter because Coy thought his life was in danger.

“He wasn’t reckless, he was reasonable,” said attorney Mark Collins.

Coy had gone to the neighbourhood to investigate a complaint about someone inside a running vehicle when he first encountered Mr Hill sitting in an SUV.

Mr Hill told Coy he was waiting for a friend to come outside.

The officer said he thought Mr Hill seemed dismissive and then suspicious after Mr Hill walked to a house and knocked on the door before entering the garage.

Coy said he lost sight of Mr Hill and suspected he might be trying to break into the house. Coy used a flashlight to spot Mr Hill in the garage and told him to come out, the officer testified.

When Mr Hill walked toward him, Coy said he could not see the man’s right hand and then saw what he thought was a revolver.

He said he yelled, “Gun! Gun!” and then fired at Mr Hill.

Family and friends said Mr Hill — a father and grandfather — was devoted to his family and was a skilled tradesman who dreamed of one day owning his own restaurant, after years of work as a chef and restaurant manager.

Coy had a lengthy history of complaints from residents, with more than three dozen filed against him since he joined the department in 2002, according to his personnel file.

A dozen of the complaints were for use of force. All but a few were marked “unfounded” or “not sustained”.