The transfers of car ownership have to be done formally either in traffic registry office or in notary as it's order by law within the borders of Turkey. Considering that your husband can not go to the registry office, or notary due to lying in jail as an arrested person, you can merely call the notary to the jail(in return of a surplus fee) for making the formalities of transferring the ownership of the car from your husband's name to your's.

King of regards.