I let a boyfriend of mine at the time use my car and the tag was taken down as a vehicle in an armed robbery. The police department called me and I gave all of his information to the detective ( the dectective also told me not to tell him what was going on). A week ago, I was at work and the police district of city I work in came to my job saying that my vehicle was stolen then they later changed and said my car was involved in an armed robbery. I told them I knew about it and they asked for my then boyfriend and I couldn't give them information about where he was because I honestly did not know. They took my car and impounded it as evidence. Now I called the detective and he told me that I had to turn him in to get my vehicle out or they are keeping my car. I did not know where he was and I was not even with him because we have broken up by then. Is this legal can they hold my car because they cannot find his whereabouts?