Being 'scooped up' for military research - or being a creation of military research - has been a common trope of movies and TV for many years. However, in most western nations, if not most nations around the world, undertaking research on unwilling human subjects is illegal.
In my world, around nineteen years ago, humantaurs began to appear at a rate of 1 in 100,000 births. Eighteen years ago, an entire mountain appeared in Port Philip Bay off Melbourne at dawn and disappeared again the following midnight, and began appearing in other places around the world on a semi-regular basis. It was filled with all sorts of strange people alongside normal humans. The modern world began to become aware of magical realms in which other different humans and maybe-not-humans lived.
There were satyrs and fauns seemingly from classical mythology, unicorns, lamias with serpentine tails, water-breathing merfolk. Elves, gnomes, pixies and faeries that range down from four feet to four inches tall, and the faeries have wings and can fly. Fire-breathing flying wyrms. Dryads, oreads and nereids. Flying lilim with wings... they're all apparently just varieties of humans whom we didn't know existed, and all are able to interbreed and produce viable offspring. There are even centaurs, bostaurs (cattle centaurs), cervitaurs (deer centaurs), dverge and svart-alfar, who might not be human at all. All of these peoples have human levels of intelligence, and the ability to communicate and insist upon their human rights.
So, considering that we start off with our modern-day society here on Earth, just how likely is it that some of these people might be 'scooped up for military research' when they begin to appear, i.e. kidnapped off the street or someplace else, tossed in a van and carted off to a secret research facility to be experimented upon against their will by some corporation or government, or some similar non-consensual variation thereof, how likely would it be to be revealed to the general public, and what might the legal, social and political consequences of such non-consensual research be if it happened at all?
I do not count researchers advertising for volunteer test subjects, paying them for their time, and allowing them to leave if they wish to mean that the subjects were 'scooped up for military research'. The relationship between test subject and researcher must be non-consensual to be the subject of this question.