George Floyd's killer Derek Chauvin was transferred to a new prison months after the stabbing

Derek Chauvin, the former Minneapolis, Minnesota police officer convicted of murdering George Floyd, has been transferred to a new federal prison after surviving a stabbing while in custody last year, according to the Federal Bureau of Prisons.

Chauvin, 48, was transferred to the Federal Correctional Institution (FCI) Big Spring in Texas on August 20, a Federal Bureau of Prisons spokesperson confirmed to PEOPLE on August 21. The spokesperson declined to comment on the reasons for Chauvin's transfer to the low-security prison.

Chauvin was sentenced to 22.5 years in prison – or 270 months – in June 2021 after being found guilty of murder and manslaughter in connection with Floyd’s killing.

On May 25, 2020, Floyd, 46, was seen in a viral video taken by a bystander lying on the ground with his hands handcuffed behind his back while Chauvin pressed his knee on Floyd's neck for about nine minutes.

“I can't breathe” and “They're going to kill me” were some of the unarmed man's last words before he lost consciousness and died at a local hospital. Floyd had been arrested by Chauvin and three other officers – who were also convicted for their roles – after allegedly using a counterfeit $20 bill at a Minneapolis market.

Chauvin also pleaded guilty to violating Floyd's civil rights and was sentenced to 21 years in prison. His sentences will be served concurrently.

Chauvin previously served his sentence at the Federal Correctional Institution in Tucson, Arizona, a medium-security prison, where he survived a stabbing by another inmate on November 24, 2023.

Federal authorities accuse John Turscak of stabbing Chauvin 22 times with an “improvised knife,” PEOPLE previously reported.

According to the Associated Press, prosecutors said Turscak allegedly told investigators he attacked Chauvin on Black Friday, the day after Thanksgiving, to create a symbolic connection to the Black Lives Matter movement and the “Black Hand” symbol associated with the Mexican mafia gang.

Tursack is charged in federal court with attempted murder, assault with intent to murder, assault with a dangerous weapon and assault causing great bodily injury, the U.S. Attorney's Office previously announced. It is unclear whether he has pleaded guilty to the charges.

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On Tuesday, Thomas Lane, another former Minneapolis police officer, became the first officer convicted of Floyd's killing to be released from prison, a Federal Bureau of Prisons spokesman confirmed to PEOPLE.

He had served a two-and-a-half-year federal prison sentence earlier this year and was serving a three-year state sentence for aiding and abetting second-degree manslaughter, according to CNN.

A spokesperson for the Minnesota Department of Corrections told PEOPLE that Lane will now serve a year on probation.

Like Lane, two other former police officers were convicted in federal court of violating Floyd's civil rights. Tou Thao and J. Alexander Kueng were sentenced to 42 and 36 months in federal prison, respectively, in July 2022, the U.S. Department of Justice said.