I’d forgotten that, was Dahmer the one beaten to death with a mop handle?
Christopher J. Scarver (born July 6, 1969) is an American convicted murderer who is best known for killing serial killer and cannibal Jeffrey Dahmer at Columbia Correctional Institution, Portage, Wisconsin, in 1994. Scarver used a 20-inch (51 cm) metal bar he removed from a piece of exercise equipment in the prison weight room to beat Dahmer and another convicted murderer, Jesse Anderson. Both Dahmer and Anderson died later from their injuries. Scarver was sentenced to two further life sentences for the killings.
https://en.wikipedia.org/wiki/Christopher_Scarver