my theories on what happened to the beats (based off their names)
Beat 1:He was a test subject who was horrifically experimented on and eventually gained to ability to detach his head
Beat 2:he was some kind of prison warden who was cruel
Beat 3:Some kind of Spyware that infected a computer
Beat 4:Someone who followed people and eventually killed them
Beat 5:They are a endritch worm-like entity who eats people
(feel free to tell me if any of these theories are correct or not :3)