Yes, if the guy is convicted I think it would be fair punishment to set him loose in the woods painted hunter orange. The same county where he commited his crimes.
But I think shooting with a rifle or shotgun would let him off too easy as it would most likely be a one shot deal.

.22 cal air rifles.

No more than say 650-700 fps max.

Ammo: Salt pellets

Should take about 200 good hits.

After 100 hits he'll be begging to be finished off and the POS can answer the question............."Aren't you dead yet?"