how did the killer??

Rating: Null/10 (10 November 2004)

I have a problem understanding how Zep fits into all of this. All the other victims were tortured in some way but Zep got to hang out and watch TV all day. How did the killer force Zep to make a choice to kidnap and kill the Dr.'s wife and kid? Zep was never bound or restrained in any way. Did the killer just say, "Do this or else...". I understand since Adam only plays a portion of the recorded message intended for Zep we the viewer are supposed to imagine the rest but really, Zep had free will to do as he pleased. Am I missing something?? Where was the game Zep was playing in because his actions were not very torturous? Please some one tell me how all of this came about? Or at least your guess?