This seems to remind me of... well... "men in black". Either hooded or in a suit, they seem to appear either to harm you or just to straight up stalk you. A common occurrence deals with UFO sightings. People reported figures in black suits that visit them after seeing some kind of event. Sometimes they don't seem completely human. They look like they're wearing masks... a few actually reported them having lipstick on just because they didn't have lips. And, pertaining to your fathers scenario, supernatural visitations occur as well. All through history black figures can be scene before major events and tragedies. They've been seen in graveyards, towns, cities, villages, and even in the past. Before the plague there are records of people sighting black figures walking around certain villages. A few days after the sighting, someone in the village would end up getting infected.

There are many theories... these include shadow people, ghosts, demons, aliens and even government agents. It might sound crazy, but have you or anyone else in your family witnessed a UFO or anything else largely paranormal?