That dog must be punished humanely. Has it been neutered/spayed already? If not, you know what to do.
Things like this make me laugh. I have 3 Cane Corso's and none of them have ever chewed anything? When they were puppys they were kept in a playpen and only chewed what was given to them. They are all a year old now and never chew on anything but their outside toys. Plus I dont ever keep my treasured beloning out in the open for anything or anyone to mess with. I am sorry for you loss but it was all your fault.