I don't know of any bigfoot creatures that carry firearms and shoot people.
But that story is still frightening in that it is so close to me. I am hoping it is some kind of revenge or personal vendetta thing and we don't just have someone in the area commiting random killings.
I am fairly sure that is not the case as majority of killings are linked in some manner by familiarity and have a motive. But until we know for sure, it would be wise to be more alert and onguard.