How do you destroy an invoice with a sledgehammer and why?  Seems like a lot of work to me.
Why steal invoices?    Is there value in these other than the person who produced the invoice and needing to be paid?  Maybe I'm in the wrong business and should just print up invoices to sell.
Was it someone who had worked for them?  Seems that would be a pretty short list of suspects and the criminal would have been apprehended by now.

Maybe he should have just said his dog ate his home work.  While his reason is possible I find it highly unlikely.  Maybe I'm too much of a skeptic here but is just doesn't seem to add up to me.

Apologies to Doug for hijacking his post.