Bear and culvert trap
If I remember correctly, that warden had trapped a "black bear". He knew it was a black because there were no grizzlies in the area, and he had released many blacks while standing on the trap. When the door opened, the blacks would scurry away. Well, this time, when he opened the trap, the "black bear" had somehow turned into Mr Long Claws and was somewhat less charitable about his brief incarceration, and was going to give the warden a brief course in constitutional law, as interpeted by grizzly bears. I think the episode took place around the ennis area.
If I have screwd up any or all the facts here (which I am apt to do), please feel free to correct me.

Fred