This undated photo provided by the Hennepin County Sheriff's Office in Minnesota on June 3, 2020, shows former Minneapolis Police Officer Derek Chauvin. Recent assaults on two notorious, high-profile federal prisoners have renewed concerns about whether the federal Bureau of Prisons is capable of keeping people in its custody safe. Chauvin was stabbed nearly two-dozen times in the law library at a federal prison in Arizona in November. (Hennepin County Sheriff's Office via AP, File)
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