I'll weigh in on this, because I agree with Ric -- there is little justification for turning coons loose. As he said, coons are rapidly sliding from game/furbearer to vermin.
We hit a crisis point with this about 20 years ago in Ohio. The DNR was on the verge of simply removing the season on coons, the hunting and trapping season on coons would have been the same as that on Norway Rats. We (OSTA) got them to modify their stance so that a landowner, or his agent, could remove coons any time they were doing damage, yet maintain them as a furbearer with a regular harvest season.
I've already killed three coons in my backyard this summer, and there are more around. Summer, winter, spring, fall, I do not release coons. If we are going to maintain that we (trappers) are influential in controlling the population of wild animals, then we need to do just that.
If, perchance, the prices increase on the pelts and enough folks are willing to get after them, then the population level may decrease, and there may be some justification for releasing them. Until that time, any coon I catch is a dead coon.
(P.S. I ain't turnin' loose no coyotes either.