Arizona inmate charged with attempted murder after Derek Chauvin stabbing

Federal prosecutors announced attempted murder charges against an Arizona inmate Friday, a week after ex-Minneapolis cop Derek Chauvin was stabbed 22 times inside a library at the Tucson penitentiary where they are both inmates.

John Turscak, 52, is also facing multiple assault charges and inflicting serious bodily injury with an "improvised knife" around 12:30 p.m. on Black Friday – a day the suspect allegedly told investigators he picked to symbolize the "Black Lives Matter" movement, which spurred months of protests around the country in connection with the death of George Floyd – who Chauvin was convicted of killing.

Federal corrections…