Tank, I was reading comments from part 3. I think I can answer you question.
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I do have a question. We all know that Luthor is evil (almost as evil as Kaethel and Wendy) but why would he kill the person who is carrying out his plan for him? Especially afte he'd just finished giving him several instructions as to what to do with Kent, and the body, and the kryptonite. I can see Lex killing for fun, or to protect his identity, but apparently he still needs this guy.

Well, the man in the room w/ Lex works for a major drug lord who is carrying this stuff out.(But by now you have probably figured that out by now).