Cahill postponed the trial from August 2021 to March 2022, the Wall Street Journal and other news media reported.
Former Minneapolis police officer Derek Chauvin faces the prospect of a lengthier prison sentence after a judge this week agreed with prosecutors that he abused his position of authority while arresting George Floyd previous year.
A jury found Chauvin, 45, guilty of second and third-degree murder and manslaughter after hearing three weeks of testimony in a highly publicized trial.
A judge postponed the trial of three former Minneapolis policemen accused of taking part in the murder of George Floyd to March 2022 after they said that prosecutors leaked prejudicial information about the case, according to media reports.
Derek Chauvin, a 17-year veteran of the Minneapolis police department, is to be sentenced on June 25 for Floyd's May 25, 2020 killing.
Chauvin, who is white, was convicted in April of second-degree unintentional murder, third-degree murder and second-degree manslaughter for pressing his knee against Floyd's neck for about 9 1/2 minutes as the Black man said he couldn't breathe and went motionless.
Defendant committed the crime as a group with the active participation of at least three other persons.
Another aggravating factor, the judge said, was that children were present and "observed Mr. Floyd being asphyxiated as he begged for his life".
Attorneys for Floyd's family applauded Cahill's ruling.
In the federal charges, Kueng and Thao are accused of failing to intervene to stop Chauvin from pressing his knee onto Floyd's neck for more than nine minutes on the asphalt previous year.
With Tuesday's ruling, Cahill has given himself permission to sentence Chauvin above the guideline range, though he doesn't have to, said Mark Osler, professor at the University of St. Thomas School of Law.
Eric Nelson, Chauvin's attorney, did not respond to a request for comment. He faces a combined maximum 75 years in prison if the sentences run consecutively.
Dual prosecutions at both the state and federal level are permitted in the United States but are relatively rare, highlighting the importance of this case, which sparked a massive wave of national demonstrations last summer.
Prosecutors had called for an upward departure, meaning a sentence longer than what's found within the guideline range.
The judge rejected a fifth point stating that Floyd was considered "particularly vulnerable". He also argued that the verdict was contrary to the law.