Deeply troubling watch. Not at all sure how I feel about social media being used to indict people in an actual court of law, never mind as a tool of narrative filmmaking. This definitely has more in common with a feature (and a cautionary tale) than it does a doc, and its protagonist-cum-anatagonist needs no help to hang herself. But then again, that's exactly the issue.

I'm not that preoccupied by questions about her level of guilt. She did it…

Put this on as a departure from my usual Saturday night George C. Scott horror staple Exorcist III but there's a surprising amount of overlap with it - similar genre splicing, frigid locales, abrupt flashes of shocking brutality. That said of course the atmosphere in this one is different and all its own. It's chilling and insidious as opposed to pervasive and alarming, and I would say it creeps up on you were it not for the rather uncompromising starkness…