If you were to read around the subject, you would realise that the blackmail case was one of the triggers for the HdLG investigation. It, along with other evidence, led the police to conclude that all was perhaps not quite right in the parish of St Martin.
I see <light dawns> - so, as Deputy Chief he had no influence over that case at all then? Couldn't brief the press on that one? If so, what made him think that any other alleged cases would be any different? Or was he hoping they would implicate more senior officials? I wonder at what point SS got involved.
Are we moving towards a suggestion that:
Frustrated he was unable to charge someone for abuse in the blackmail case (mustn't forget the frustration over the RPGs), he embarked upon what would be a high profile, media-intensive case to ferret out other senior govt. officials whom he suspected may have been guilty of something?
Maybe then, after failing to uncover anything of that nature after two years of "undercover" investigations he decided to go public in a blaze of media frenzy to see if he could "uncover" anything...