Okay, I've waded through the transcript and it appears the investigators suffered unreasonable outside interference from their superiors (in rank only apparently) and inside interference from leaks.
McEvoy's statement certainly helps the Dgos' position but anyone who thinks something terrible and, in all probability, criminal is kidding themselves IMO. The bit I can't get past is why these blokes refused to answer questions fully and frankly and in a timely manner, i.e. immediately. Anyone who fails to do that usually has something to hide and I don't grant such people the presumption of innocence.
The reason for my attitude is that I reckon the criminal justice system is already slanted far too much in the bad guys favour. "Better 10 guilty men go free than one innocent man convicted..." and all that. So the guilty hide behind the checks and balances put in to protect the innocent, e.g. the right to silence (another concept I don't agree with).
And it's not that I am anti-Dogs, despite all the problems that have come from their quarter. I am against any suggestion of criminals using the law to hide behind and that's what this looks like.
So we'll have to agree to differ on this one.