Motercycle Confiscated by LAPD

I did a custom paint job on a Harley Davidson. It soon became apparent that the owner was not able to pay his bill and after several months could no longer be located. I proceeded to have a Lein Sale, following every stipulation of Civil Code 3072. This took 3 months. With there being no qualified bidder, I completed the Certification of Lein Sale, showing myself as both buyer and seller and went to the DMV and registered it. I began to restore the bike. When it was dropped off, it didn't run and was literally in pieces, with most missing! I have invested a lot of time and money.. Then out of the blue, 2 plain clothed detectives showed up at my home. They said that the bike had been stolden,,,7 YEARS AGO,, and now belonged to the Ins. Co! I explained the circumstances of my acquiring the bike and attempted to show them my paper work and receipts. They glanced at them and told me to meet them Mon. at the Tow Co's Impound Lot. I asked for the name of the Ins. Co., hoping to negotiate and they said they would talk to them for me. They then left with my bike. On Mon. I was told the Ins. Co. was not interested in talking to me, but would take off all the parts I had receipts for and return them. The bike is still impounded, in my name!! What recourse do I have??!!!