It's probably in parts already...
When my CBR150 went missing, I called in the police, then had to go to the station, it took hours for the report. They kept the green book and said they would inform the department of motor vehicles that the bike was stolen.
A month later they called me, they've found the frame, picked very clean, even the stickers were gone, under a bridge. It took a lot of time and paperwork to get the frame released; when I asked for the green book, they refused to give it back. No matter what I said, they wouldn't give it to me. I guess the only way would have been to get all the parts, put the bike back together and then apply at the DMV for the book, including the engine change.
I then asked them under which bridge they found the frame...