What I like about suspense series like this is all the conspiracy theories you can come up with.

Here’s another easy one:

The founding members - or least, the old members - of the shady corporation that sunglasses dude belongs were responsible for the mass killings and dismemberments back in the days.

After that period of bloodshed, the organisation survived instead of getting dissolved, but now has a fresh face: a modern company that “investigates” the occult.