Dear... before commenting about your worries have a few question to ask..

1. Have you lodge any complaint to the police immediately after the theft?

2. Was it before the series of accidents occured?

If you are saying yes to 1, you have all rights to avoid paying the penalties.

If you are saying NO to 2, you must face all legal actions.

And its said witness, it has less importance if its your friend or husband. So, need to know more about the incident like
1. when did you find it- your car is stolen (time)
2. Immediate action taken against it (time)
3. When did you know that the car is being abandoned somewhere (time gap)
4. How did you know it found in a place (time gap)
5. Witness- What did he/she saw? (report)

I believe it may not be 100% true statements. Some parts missing in this story. Either may be given to your friend, co-worker or some one you believes for a drive. Or it may be a part of revenge... Or what else?