|Played by||Tea Leoni|
When her friend Maxine Logan asks her to come with her to a John's house, because Maxine is doing a favor for the police, Julie agrees. Julie is in the restroom when the John's boss comes back and kills Maxine so there won't be any witnesses. Julie is witness to the murder and calls the police. Since the only person she knows on the force is Maxine's friend Mike Lowrey, that's who she asks for. The only problem is that Mike isn't available, so Marcus pretends to be him in order to get the information they need.