You say that if there really were aliens living among us, they would have infiltrated the sciences and would be interfering with human reproduction. You can't expect a few insidious alien invaders, no matter how cruel and devious they are, to be able to confront the whole human race head-on. They can only destroy humanity and humanness by dividing us into bite-sized pieces. The invaders have to start out by destroying the weakest and least defended outposts of our culture. That's why the Ridge Reich has started it's annihilation by attacking the poor, the sick and the non-voters.
Prisoners are in the same category.
They are already captives and eradicating or enslaving them is a primary objective of the alien invaders. Even as we speak, prisoners are being compelled to give blood and tissue samples, their DNA is being collected and studies and alien schemes are being hatched to assure that they remain slave-labor for the rest of their lives. Laws are being enacted to make sure that the human male prisoners can't reproduce and will remain docile. That brings us back to Doctor Justine Schober. Physically, Schober closely resembles a human female.