Turscak, serving a 30-year sentence for crimes committed while a member of the Mexican Mafia gang, told investigators he thought about attacking Chauvin for about a month because the former officer, convicted of murdering George Floyd, is a high-profile inmate, prosecutors said. Turscak later denied wanting to kill Chauvin, prosecutors said.

Turscak is accused of attacking Chauvin with an improvised knife in the prison’s law library around 12:30 p.m. on Nov. 24, the day after Thanksgiving. The Bureau of Prisons said employees stopped the attack and performed “life-saving measures.” Chauvin was taken to a hospital for treatment.

Turscak told FBI agents interviewing him after the assault that he attacked Chauvin on Black Friday as a symbolic connection to the Black Lives Matter movement, which garnered widespread support in the wake of Floyd’s death, and the “Black Hand” symbol associated with the Mexican Mafia, prosecutors said.