Man oh man, you guys are so nice to a n00b

. Thanks for all the quick replies. I appreciate it oh so much.
I'll try and answer as many questions as I can, however I don't have answers to all of them.
This is in the State of California.
I believe the car was purchase in February.
The car has been in my friends name and because she didn't want to get negative credit, she has been wasting her life savings paying off the car every month. ($500/month)
The car was $29,000 USED! It's a luxury car (a mercedes).
There was no written agreement about use of the car, or payments or any of that, it was all verbal.
Everything is in her name. The title to the vehicle, the credit report, etc etc.
So what the general concensus is, is that she should make a police report, saying that the ex has the car, he does not have a right to use it, he is not on the title of the car, he is refusing to give it back, leaving out that she agreed to put it in her name, etc etc?