DEKALB COUNTY, Ga. — The former DeKalb County police officer who is accused of fatally shooting a naked, unarmed and mentally ill military veteran 10 years ago has entered a guilty plea to resolve the case.

According to officials, Robert “Chip” Olsen was sentenced to prison for killing Anthony Hill who was naked and unarmed at an apartment complex in Chamblee in March of 2015, officials say.

DeKalb County Superior Court Judge LaTisha Jackson, who presided over the original trial, sentenced Olsen to 15 years to serve 12 years commuted to time served with the balance to be served on probation.

DeKalb County District Attorney Sherry Boston released the following statement on Wednesday saying:

“It has been more than a decade since Anthony Hill’s life was cut tragically short. Defendant Olsen’s guilty plea brings this long, arduous chapter to a close and through it he has finally accepted some responsibility for his actions. I am proud of the work my team has done to secure justice for Anthony Hill and his family. We have stood with them every step of the way and made this difficult decision only after lengthy discussions with Anthony’s family. We hope this plea provides them some peace.”

Hill’s family previously said Hill was a U.S. Air Force veteran who struggled with mental health problems.

According to DeKalb County officials, Olsen responded to an apartment complex on Chamblee Tucker Road after multiple 911 calls about a person acting erratically.

Upon arrival, Olsen spotted Hill, who was in the middle of a mental health crisis, wandering around the complex unclothed and unarmed. As Olsen approached Hill in his patrol car, Hill began running toward the officer with his hands out. Olsen exited the vehicle and pulled his gun, officials said.

Olsen ordered Hill to stop, however, when he refused to stop, he was shot twice including in his neck and once in the chest.

Investigators say Olsen falsely claimed that Hill attacked him and that he had shot Hill in self defense.