The white former Minneapolis police officer convicted last month of the murder of the black man George Floyd has requested a new trial.
Derek Chauvin’s legal team have filed court documents alleging misconduct by both prosecutors and jurors.
The New York Times reported that the jury’s decision could be overturned because of the evidence in the case.
Court documents filed claims that the process was not impartial because of pre-trial publicity.
It claims that it was “so pervasive and so prejudicial” before and during the trial, that it amounted to a “structural defect in the proceedings”.
The motion also alleges that errors were made by the judge and that there was prosecutorial misconduct and witness intimidation.
Chauvin, who was captured on video kneeling on Mr Floyd’s neck for more than nine minutes, was found guilty of murder and manslaughter.
The rare verdict against a police officer was considered a milestone in the racial history of the US and was widely applauded by Americans. Chauvin faces up to 40 years in prison.
He will be sentenced next month.