Here's something to throw out - given how the car is registered to Puerto Rican company, I wonder if the Mosler had PR registration...the car is current, just not for US/DC. If the plan was to kill the S family, they could have intended to take the cars and show a fake backdated sale so that it would appear the Mosler was never stolen. However, with the Mosler being unregistered or with a PR registration that could have thrown a monkey wrench into that as PR has it's own unique vehicle registration process. If SS rarely takes his Mosler out and a fake sale is dated weeks ago and he's not alive to say it's a forgery, you could launder the theft into a clean title to make it appear SS sold his car before he was murdered and that it was not stolen.