After he was already dead, he was then stabbed over a dozen times in the back, again presumably by Rosenberg. Katz's body was then stripped of its clothes and dismembered, likely by DeMeo and Testa, both former butcher apprentices. After the corpse was decapitated, one of the men, presumed to be Rosenberg, crushed the head with a machine normally used to compact cardboard boxes. Because of the damage done to the remains, dental records had to be used in order to positively identify the victim as Katz.