UFO researcher, Albert K. Bender, had to halt his studies after being visited by strange entities dressed in all black, in this clip from …
source
Ancient Aliens: Aliens in Disguise Warn Researcher – "We've Taken Many Humans" (Season 18)

UFO researcher, Albert K. Bender, had to halt his studies after being visited by strange entities dressed in all black, in this clip from …
source