JahaRa
Noble
There is YT channel "Rich Planet" and it has a whole series of videos about NATO coverup of human mutilations. It's quite gruesome to listen because these mutilations were truly horrific.
As well, some policemen from US wrote a book (forgot his name and the book) but there are few videos where he gives a lecture about his investigations. Possibly this is a good start:
If published UFO witness accounts are a good proxy representation of a number of human mutilations, my personal estimate would be that about 10% of alien-human encounters end up as mutilations. This doesn't necessarily reflect negatively on aliens, because if you flip that percentage then 90% of encounters are not intentionally harmful. It's almost certain that we are visited with more than one alien species, so some are good, some are bad and some are in-between. Current scientific estimates are about 30-40 technological aliens in Milky Way, spaced out on average by 1,000 light-years distance.
On the opposite side of the coin, less than 10% of encounters were reported as friendly. Like where aliens went out of the way to have a chat about life, the universe, and all. I would say 80% of direct alien-human encounters were just for scientific interest, like medical examinations and safe return.
Now, for me personally, 10% of being chopped up (without anesthetics) is too darn high to enter UFO. That's 1 in 10.
I am interested in your scientific documentation. Where do you get your "current scientific" estimates?
Also, the videos are not available. Oh, you have to click on the link to see them. OK.