Robert Fisher has been described as somewhat as a survivalist so him living in some sort of Amish population or similar wouldn't be that far fetched. (I can swear a posted had this theory before.)
I had mentioned this back in June or July of 2016 that he may have been hiding out in an Amish community, and it's not far fetched since the AMW Call in August was in Virginia, so it's close to the area in which there are Amish communities. Plus the fact that they don't use cameras make it even better for Robert Fisher, but harder on Law Enforcement.
if Fisher is living in one of those communities in Maryland, Pennsylvania, Ohio, Indiana or Virginia, he probably may have a grown out beard and seldom goes to a hospital depending on which Amish community it is. This lifestyle is right up his alley, I can't think of Jason Brown living amongst the Amish as he seems too cocky and too full of himself, unless he got very desperate, but either way this throry is fitting for Fisher regardless, plus I got the inspiration of this theory from a detective hiding from some corrupt police officers and stays with an Amish family that he tried to help when their home got broke into. It was a great movie, but back to Fisher, anything is possible almost 16 years later.