(Is that the translation, "His life's forfeit"? I've always seen it as "I'll kill him.")
Sorry, just obsessed with playing with the Chinese text as usual... . It's 我必要他一命, which is literally "I need his life" or "I'll have his life," I think, always allowing for my extremely WIP Chinese skills; so I thought "His life's forfeit" would come out right in English. "I'll kill him" is absolutely what he means though!