Memo 6751 from
https://vault.fbi.gov/UFO/UFO%20Part%201%20of%2016/view speaks of interviews of persons who believe they were in contact with other dimensional beings.
Out of context the reasons why the FBI was interested enough to do the interviews are left unexplored.
--- Steve K9ZW via SPOT BBS
--- Mystic BBS v1.12 A48 2022/07/15 (Linux/64)
* Origin: SPOT BBS / k9zw (700:100/69)