Mr. Brooks is a professional business man who just happen to like to kill people. Recently trying to suppress his eurges of serial murder, his manipulative "id" urks him to commit more crimes. Throw in a blackmailer (Cook) and a cop hot on his trail (Moore)and you got good times.
Mr. Earl Brooks
Don't worry. If I were here to kill you, you would already be dead. After you left today, I realized that our friendship was a little one-sided. So tomorrow night when we meet, if you'd be so kind as to bring all the pictures and the memory card from your camera. That way we could like each other simply for who we are. If you don't show up, I will presume that you've gone to the police, and I will kill you. Even if I go to jail because of you, Mr. Smith, someone will find you, wherever you are, and they will kill you.