Sooooo- if the guy did a hit and run- the cops would show up at whose house?
There is such thing as being friendly, and another thing as putting yourself in a really bad position. Hope you find your plates, in the meantime don't let anyone borrow a gun to go plinkin' unless you've known them for years. Same goes for anything else registered in your name.
I'm surprised the cops were so nice about it. You just informed the cops that you were aiding and abetting the crime of driving without a registration. And if the car was stolen, it might even be worse. Hate to kick someone when they are down, but this goes under the heading of a bad move.
The other, other white meat.