Hi my first post just want to add to the discussion:

For those saying Bill Roberts can't William Roberts because they didn't refer to him as Dr. in the news report, I wouldn't rule it out just yet, Conrad Murray hhat link is to an article on Conrad Murray while the article may mention he is/was a doctor the headline doesn't, and in this case his being a Doctor has direct relevance to his case, in William Roberts case him being a psychopath not so much to do with him being a doctor. So I think we can hold off on making that the deciding factor.

Also Follistatin is found in high concentration in human skin maybe they are dying off because they are losing Follistatin, it could why they try to eat humans, if they can't find humans each other (less follistatin then a human, but better than nothing), or if they can a nice refreshing bottle of Follistatin. It could also explain why sweat which comes out through pores in the skin is so attractive to them, it's like smelling food form a nearby restaurant when you're starving.

Just my thoughts on what's happening.