Derek Chauvin's plea offer has been approved by the federal judge presiding over the proceedings of the four former Minneapolis police officers charged with the death of George Floyd, and he will be sentenced to 20 to 25 years in prison.

Read more: Ex-police officers found guilty in murder of George Floyd

That sentencing range was outlined in Chauvin's plea bargain, which also said that he would be expected to spend between 17 to a little more than 21 years, "assuming all good-time credit."

Floyd's death on May 25, 2020, sparked protests nationwide against police brutality and racial injustice.

After pleading not guilty for months, Chauvin pleaded guilty in December to violating George Floyd's civil rights at the federal level. Life in prison is the maximum sentence.

The judge had delayed accepting Chauvin's plea deal until the completion of a preliminary presentence investigation report.

According to the plea deal, the federal term would run concurrently with the state-level penalty of 22.5 years for murder.

US District Court Judge Paul Magnuson didn't set a date for the sentencing. Chauvin was sentenced in state court in June of last year after being convicted of murder in Floyd's death.

He would be required to serve two-thirds of the state term, or 15 years, under Minnesota law, and would be eligible for supervised release for the remaining seven and a half years.

Chauvin has asked the Minnesota Court of Appeals to overturn his conviction.