I did not know Larry but from what all of you wrote about him a great person has passed away.
It would seem the thief's identity is known. I do not understand why (if all or some of the Titles have been recovered) there is any confusion on whom has the missing cars. It would seem blatantly obvious that the person who had possession of them and the keys to the building as well as Larry's truck and mini van is the culprit.
I hope especially for the sake of his wife that the situation resolves itself and she can get on with trying to come to grips with his passing and start to heal.
This does bring to light that some of these Super Cars have become exceedingly valuable and means should be taken by the way of secure garages with security systems to safeguard them.
Ironically if the thief in this case had the keys security really does not matter.