Help identifying a large black/brown hawk-like bird?

I live in central Maryland and we have a group of very large brown (or maybe black) birds residing in my yard that I am trying to identify. They probably have a 5' wingspan, maybe slightly larger, and they have white wing-tips. They have a body shape like an eagle or hawk and I have seen one eating a fox. I have been researching trying to figure out what it is, and I know that it is NOT a vulture. It's head is nothing like a vultures head, it looks like an eagle or falcon head. In my research, it resembles the golden eagle, but I'm not sure it could be that. I see them all year round, during the summer they sit on the roof with their wings spread all the way out. Any help would be great! Thanks