Michael Slager May 2017 booking photo

After pleading guilty to a federal charge in Walter Scott's shooting death, former North Charleston police officer Michael Slager was booked Tuesday, May 2, 2017, into the Charleston County jail. Cannon Detention Center/Provided

Attorneys representing former North Charleston police officer Michael Slager filed a motion to unseal transcripts of testimony by key prosecutors in the case against him.

In the motion filed on Friday, Slager's attorney asks to unseal testimony transcripts by 9th Circuit Solicitor Scarlett Wilson and Deputy Solicitor Bruce DuRant from a pre-trial hearing on Oct. 21, 2016.

During the hearing, the court heard testimony by Wilson and DuRant on why the grand jury was given a murder indictment rather than one for manslaughter, according to the filing.

Slager signed a plea agreement that allows Wilson to have an opportunity to comment on what she believes his federal sentence should be, the filing said.

"Such a request is virtually unprecedented in the Federal District Court of South Carolina," the filing said. "To insure that the Solicitor's comments are consistent with her previous sworn testimony, Slager requests that the testimony ... be unsealed."

In May, Slager pleaded guilty to violating Walter Scott's civil rights when he shot the 50-year-old black man as he fled. Video of the April 2015 shooting, that followed a traffic stop for a minor violation, spread worldwide and brought intense scrutiny to North Charleston amid a broader inspection of police uses of force against black people.

North Charleston ultimately paid $6.5 million to Scott's family. Slager has yet to be sentenced. 

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Reach Gregory Yee at 843-937-5908. Follow him on Twitter @GregoryYYee.

Gregory Yee covers breaking news and public safety. He's a native Angeleno and previously covered crime and courts for the Press-Telegram in Long Beach, CA. He studied journalism and Spanish literature at the University of California, Irvine.