Sad about the wolf, but things like this do happen. It's a little hard for a wolf to hunt by itself being a pack animal. I don't think they are living a happy life when alone. 
There were once three pups who lived in my yard in the Copper Valley, a white one, black one and a grey one. They had been raised on a pond back behind my house. Used to come look in the windows, sit and watch me burn trash and annoy my bulldog. He would actually chase them to an invisible line and sit and watch them, not allowing them to cross it. They liked to play in the Glenn Highway. Most people who saw them just cussed because "those dogs were in the road again. Had to slam on my brakes!"  Eventually they all grew up and went on their way. 
When I was young there was an old one who walked up and down the river at night. 4 inch tracks. My dad called him "Old Grand dad". He'd let out the most bone-chilling, moaning howl once in awhile.
Stars, moon, cold and it was scary!
Wonderful animals but fierce hunters.