The Ethical thing to do is shoot it..But personally I'd
Pass.....Report to Officer if its in real bad shape..Let them make the decision as to shoot it or have some preditor look after it......
Happened to me moose hunting a few years ago...I jumped a cow moose out of hiding it hobbled about 25yrds and bedded down.Couldn't walk anymore..
I did think about shooting it...but figured I'd just find myself in heap load of red tape....So I reported what I saw....
Don't know what happened to it after...