As she got older though, the wolf part started to assert itself and the resulting overprotectivness and other animal aggression escalated to the point that the dog had to be put down for the safety of everyone.
My mother once saw a pure malamute that acted that same way. It's not a "wolf trait." It CAN be, but dogs are equally prone to this sort of behavior (I read somewhere that mals are actuallyquite prone to dog on dog aggression as well as dominance aggression, so it is equally likely that your boss's dog was aggressive due to mal influence!)
There is no such thing as "wolf part." Every behavior found in wolves can be found in dogs, to some degree. Wolves, as a general rule, have more intense behaviors than dogs, and they react easier and stronger to stimuli than most dogs. But there is no such thing as wild wolf traits! There is no magic line between wolves and dogs. Dogs are basically just wattered down wolves.
I really don't think there is any reason to beleive this person's dog is part wolf anyway. If it looks like a husky, it probably is a husky. If it does have wolf, it is likely very little. Prey drive, pack hierarchy, and roaming are all husky traits. Aloofness is absolutely NOT a sign that a dog is part wolf. I see shy dogs all the time. I think she should be more concerned about the husky part than anything else right now. Huskies are not easy dogs, and like I said, her dog from the sounds of it is probably mostly if not all husky.
As far as wolfdogs go, they are not the pets for everyone, especially not higher contents, but the lower contents usually aren't any harder to care for than the average northern breed dog.
~Seij