@yokahontas - I actually don't care two hoots about Greg Bird and he certainly has a long rap sheet. The context really is the many pages currently discussing implications of pleading not guilty/presumptions of innocence and a few have referred to how unfairly Snake was treated (and continues to be treated)
One thing you are wrong about - self defence is a defence to any charge of assault, and glassing is a particularly nasty offence that has nothing to do with an accident.
Not believing the witnesses is a quite separate issue. But as for Bird's partner changing her story, that's simply not true! She never made a statement. And neither of them gave evidence at the first hearing, which was decided on circumstantial evidence, of which the lies about the flatmate were relied on heavily by Magistrate Clisdell to persuade him of Bird's guilt. On appeal they both gave evidence - for the first time - about what had happened, and about the lie.
Significantly, the judge didn't say, 'I suspect you of glassing but find it is not proved beyond a reasonable doubt'. In all the reports I have seen he actually accepted their evidence, he believed them. It was Milligan who was the aggressor and her injuries were an accident.
For what it's worth Judge Finnane was a very experienced judge, a QC and acting judge of the Supreme Court who'd spent many years in the Army. He had certainly 'been around the block' and I have no doubt he was capable of assessing the credibility of witnesses.
But yes I agree the courts do get it wrong at times, and everyone will form their own view from news reports, or 2nd hand inaccurate accounts of news reports, or whatever else.