Someone has created fake facebook and myspace profiles of me. How can I get them removed?

Question From User - Answers in Comments.

I'm trying to get the profiles deleted because it's not me. I just found out on Friday night, the fake facebook profile has some of my friends. But I'm worried about what it says. I cannot see it. The fake myspace profile has horrible lies written about me. The information is inflammatory. Do I need to contact the police? I haven't heard from Myspace or Facebook yet, how long will it take before they remove the information.