My cousin lost one in the river once, the deer was double lung shot, but ran straight into the river and that was that. Sorry you lost him, he is probably in the bottom of the pond, I would go back to the pond over the next few days, if he drowned he will eventually start to float and at least you can recover the rack. In a river it is a different story, they may not surface until they are miles down stream. Please check back at the pond and let us know if he shows up.

The Tazman