A few years ago, a couple we go to church with was robbed.
They lived in a pretty good sized McMansion that I been in once or twice and never got past the kitchen and living room.
Those areas were big enough.
Anyway they got robbed. Some handguns and jewelry mostly.
That had to be an inside job of some kind.
They lived in one of those really fancy developments where they had private security I think of some kind. Plus the usual alarms and locks.
I never heard if it was solved or not.
And old mustang?
This is the equivalent of a work of art.
A detective can sort this out in no time.
Start with people who knew of the car with special emphasis on folks (family, friends, and others) with big mouths.
This car is going to be a beatch to fence, even in bits and pieces. And the market will be small.