ok, but why in the world would "dad" leave his passport and an $11,000 check out where the dog can get to them??????
who's the stupid one???? hmmmmm????
...and did "dad" give him any chew toys???? dogs are gonna chew! if you give them something specific chew on, they're less likely to chew what you don't want them chewing on (shoes, etc). and reinforce good behavior (chewing on the chew toy) with reward.
my initial reaction is that this is NOT the dog's fault!!!