Unsolved true-life crime as entertainment is hot stuff. There was Serial, the podcast, which achieved the unlikely feat of making that earnest beast that is American public radio appointment listening.
And then came The Jinx, an HBO documentary which may have proved to be just that - a jinx - for its subject. Robert Durst, an enigmatic character from a wealthy American real estate family who ended up living as a woman in a dump, agreed, for equally enigmatic reasons, to be interviewed about the disappearance of his wife, and about two unsolved murders. He is now facing a murder charge. The lawyers of the subject of Serial, Adnan Syed, are attempting to get him a new trial.
But these shows - and any number of fictional cop procedurals about crime - are based on narratives in which the tension comes from not knowing who did the crime, and so the audience has as much involvement and investment in attempting to solve the crime from the couch.
TV One's excellent I am Innocent (Wednesdays, 8.30pm) has, then and on the face of it, its work cut out for it. We know that those whose stories are told are innocent - the title does that for us, even if we have forgotten the details of those stories. So far the series has told the stories of the three teenage Auckland girls who were sent to prison in 2001 for attacking another young girl.
Only two, Tania Vini and Lucy Akatere, appeared. Tania's mum sent Tania pyjamas in prison. They were Mickey Mouse PJs. After their release, the girl who wore Mickey Mouse PJs in prison took to drinking and playing up. They were good girls, who knew that their families were proud of them; they were expected to do well at school; to have good lives ahead of them. Instead they "lost their innocence ... their reputation, their friends, their schooling".