A US prison inmate has been charged with attempted murder after stabbing Derek Chauvin, the ex-police officer convicted in the death of George Floyd. Prosecutors said ex-gang member John Turscak used an improvised blade to knife Chauvin 22 times on 24 November at a federal prison in Tucson, Arizona. Chauvin survived the attack and was said to be in a stable condition. He is serving multiple sentences for Floyd's death, which triggered nationwide protests and rioting. Turscak, a former member of a Mexican Mafia gang, allegedly targeted Chauvin in the prison's law library at lunchtime. He later said that he...