It would have been impossible to write his book after he'd retired. It was published just after the case was shelved. We have a thread on this issue somewhere here.
IMO, it's not just his book, but also his promo tour, his column in CdaM and his "documentary", the latter - as an AV medium - may well have had a greater impact on public opinion.
But what was that impact intended to achieve? Why did his honour depend on attempting to seal a child's fate and the parents' involvement in public opinion in order to regain his "honour"?
Then tabloid press on both sides have been nationalistic, xenophobic and sensationalist and they copied each other's "outrageous" pieces as news in the absence of any other. If there had been a functional police press service, perhaps things might have been different. However, seasoned police officers should realise that. No one can be be expected to be treated as a hero all of the time.