A quick story:
In 1988, I sold a '64 Chevy C-10 stepside to a guy in the city.  Cash deal, I had the title notarized (required in OK) and he got the truck.  I made two copies of the BOS and kept one for me.  Back then, the tag stayed with the vehicle and not the person.
Two months later, I get a visit from Johnny Law.  "Do you own a 1964 Chevy pickup, stepside, blue?" 
 "I used to, why?"  
"Where were you on such-and-such day?"  
"I used to own the truck, sold it two months ago, so where I was doesn't matter.  So, why are you asking?"  
"A blue Chevy truck, registered to you was involved in a robbery and shooting at XYZ, you know anything about that?"  
"Once again, the pickup is NOT mine any longer.  Obviously the buyer hasn't transferred the title.  I will happily show you the copy of the BOS, which has his address on it."  
I went inside and got the copy, which I made a copy for Johnny Law.  He looked at it, I pointed out the VIN and the buyer's name and address.  He wanted both copies, to which I said "oh, ****, no!"  I gave him his copy, said "there's all the information, there is his address, go get him!", and closed the door.  Never heard another word about it again.