he had a tense history with Chris Rosenberg. Chris along with the Gemini twins beat him up and as revenge Katz attempted to kill rosenberg and unfortunetly for him Chris survived and was very pissed. Also they heard Katz was an informer. So they used a hot chick henry knew to lur katz out and then they abducted him. they took him to a meat place and brutally killed/dismembered him