In so many of the 'solved years later' cold cases you see on Forensic Files or 48Hours etc it ends up with a witness who said the police never talked to them back then. Or the police didn't follow up on the tip they gave during the investigation. Something along those lines.
Hence, if anyone still thinks the questionnaire is odd, put it in that light. LE said they don't intend to make any mistakes in this case - and that includes failing to talk to everyone and failing to follow-up on tips. They are NOT going to fail at these things.
The questionnaire is to pinpoint timing and actions that people can recall about Kyron and Terri that morning. It's a brilliant move.
Next, the tight-lipped nature of the case in terms of POIs and search details is solely due to sticking to the goal of 'make no mistakes in this case'. They obviously are
acting as if they have a person of interest, but they sure aren't going to come out and say it.
What they are willing to say though, is that no one needs to worry about their kid being taken by a stranger at this school. LOW ALARM is what they have said.
LE brought SM in for a 2nd poly, and some have reported issues with cell phone records not matching an expressed alibi. Both of those things indicate SM is being looked at, for a reason.
Every case is unique so saying LE is treating this case differently just doesn't mean anything to me. They are working THIS case the way they need to work THIS case. I think they are doing an excellent job and we all have to be patient as the story unravels.