I'm not sure if that's based on photos of him in Star Fleet uniform but if it is then Charlie Evans was in uniform, or at least uniform looking clothes (including the judo suit) in the original.
It was also a very sad episode in many ways with Charlie going back to the beings who didn't know how to feel or love. That would make him the worst kind of criminal if he were to come back.
Oh well guess we'll know soon enough.. :-)
Charlie Evans was just a teenager though, he wasn’t a Starfleet officer, which is the impression I get for this villain. I could be wrong, this is just my guess.