Find a stollen iPhone? (Not using find my iPhone)?

My friend always goes to me for tech advice and her latest problem is that while she was at a public swimming pool someone stole her purse with her friends iPhone in it. (They know it was stolen because it was gone and her belongings we scattered in the parking lot and on the sidewalk). She can't go into the "Find My iPhone" app because she uses her brothers account and he is in a detention center (I have the strangest problems to try to help them sometimes.) Is there a way to use the phone number to figure out where it is without using find my iPhone? They want to find out where it is so they can note it and probably file a police report. Is there anyway I can help them find the location of it?

No, the police could be they aren't going to be doing that type of stuff for just a stolen phone.