So I look at this, i know exactly why it happened -
You have something nice, the Bonneville, and some son of a bitch got jealous.
I live in a town full of people that like to destroy nice things.
One being the busted back window in our 1995 taurus (which we were TRYING to sell)
It was no where near as nice as your car, and our car had one thing that prolly offended someone - A bumper sticker saying,
"Keep Working. Millions on Welfare depend on you".
If it helps, it is doubtful they will mess with it again. Most of the time folks are not gonna risk their own *** with getting caught. If they do it and you catch them, you will know who did it each time.
1999 LeSabre, 3800 series II engine.