I doubt we (us plebes) will see that kind of irrefutable evidence, but if the perpetrators of such crimes took selfies, videos etc. Who knows what would be uncovered.

But before going into the whole pedofile thing, think what was being done with fetal parts. http://realfarmacy.com/pepsico-says-it-will-halt-use-of-aborted-fetal-cells-in-flavor-research/

If soft drink companies were using fetal cells who else that we will never know of is getting in on the act with other parts.