Whether the original ban was automated or not, one of their specialists must have been involved by now, not least because of the media coverage and the fact they reported it to the police. While the police declined to investigate further (from what we know, last time I read about this), there must be another reason for the account ban to remain in place.
I'm biased, I work at Google (I don't know anything about this that hasn't been reported), but I also just don't believe that a company would wilfully ban accounts that they don't have a good reason to ban, after human review. It would be a stupid move, especially considering the media attention. Hence my guess that there must be more to this story. Again I have no insider knowledge, this is purely personal speculation.