More theory/spoilers
but then we have the scene in the mess hall with Blake, Sam, an Chris. Chris in general seems to know (or at least is implying) that Russel wasn't the rapist, but before hand he says "Hes trying to take one of my men-tees away", Because Russel never tries to imply it what-so-ever the first time he appears in the lab, which gives the idea that Chris isn't as air-headed as we think he is.
(off topic)
then we have Zach, whose somehow in-twined in all of this, due to his odd connection with Russel, he seems to know Russel more then we think he does, then there's his connection to the "red hood" as well, and his appearance in the most recent of Ben's dreams, Zach is connected to Russel somehow, maybe he knew Russel when he was younger or maybe its some weird dream stuff that Zach might have, since he did appear in ben's dream near the end of the update. all in all, something is up with Zach and his connection to Russel, and its probably why he thinks Russel isn't guilty.
(but that just my take on it)