This whole thing about abducted children, they say, 800,000 children a YEAR are taken... that not only do they steal children, they use the female teens for breeding purposes... Their needs are great, between human/child sacrifices, adrenochrome needs.
Then the adrenochrome issues... I don't believe that's a theory anymore, nor a secret. They are evil evil people. They torture the children to the point of death, till they're fully terrorized, then harvest the blood and either drink it, or harvest the chemical ... AND they eat the flesh.