He didn't need to speak to them to know what was going on. That is what detectives are employed to do, interview and report.
I disagree. Any policeman worth his salt would want to meet and speak to the parents - so that he could weigh them up and make his own assessment of them. IMO it was relying on secondhand accounts and other people's opinions that resulted in him getting so many facts wrong in his book. How can you make personal judgements about other people's demeanour or behaviour when you weren't even there to witness it?
IMO It also means that he always had someone else to blame when he got things wrong.......... ''It wasn't me who got it wrong m'lud - I wasn't there - I was told that's what happened'' I suspect that is what his defense will be - if the case goes to court.
He had no trouble talking to Robert Murat when he was taken in and made an arguido.
Pure speculation on my part but as he was made an Arguido on the 4th May in relation to his other Missing child case, I do wonder whether he decided to distance himself from the parents in this case as a self-protection measure. I could be completely wrong about that but I can't think of any other reason why he decided to have no contact whatsoever with the parents this time round.