Hmmm...I'm sure the 'keys' to this mystery aren't as 'black and white' as they seem. One thing is for sure...some one is out of a lot of money....to the 'tune' of a cool 'Grand'.
How's that?
Meh...I need some sleep, and that's the best I can do in under a minute.
Clearly, proper disposal isn't the owner's forte. A truly upright citizen would've take note of the hours at the local dump. If the piano is an heirloom of some sort, I'm certain there will be much discord within the family. I doubt the perpetrator has any legs to stand on.