Bought Trailer- then its reported as stolen.

I bought a 53 Wabash from a towing company. It was a standard lien sale. The trailer was abandoned, so the towing company acquired it and legally sold it to me. Then I went to DMV to register it in my name. DMV said it was reported stolen and refused to register it. They said to call the police crime unit to find out more. I did that and they haven't finished investigating yet.
I am in possession of the trailer and have a legal lien sale title from the towing company.
Who could have a legal claim to my trailer??
What is a likely scenario when this happens?
The police said that its possible that I don't actually own the trailer.
Anybody ever heard of something like this?

 

Hopefully the police will clear the title for me. Maybe it is a fraudulent claim.

 

Nobody has mentioned a bank as a possibility. The lien process is designed to allow any potential owners to come forward before the item can be lien sold. I can only hope my claim is valid. I do have possession and legal paperwork. A bank would be easier to settle with than another trucker I think. They would be motivated to be rid of it. Thanks for the input.

 

I haven't approached the towing company that sold it to me yet. I already know what they will say. I am waiting for the police to finish investigating. I will probably have to sue them for damages. It might not be worth that trouble.