But why should that matter? If I just found my dead daughter in my basement and a police person was looking at me like I did it, I'd tell her.
"Look, you turn this place upside down and you get all the evidence you need. I know I didn't do it and I want to do everything in my power to help you find out who did."
I don't blame the cops at all for being suspicious. If for nothing else:
1) The police were called out to a child kidnapping.
2) The parents hand you a ransom note that addresses a parent by name and probably took at least 15 minutes to write - something a real kidnapper probably won't do.
3) The child turns out to be dead and still in the house.
Any cop with half a brain is going to think something is very fishy about the whole scenario. The BPD may have gotten a lot of things wrong that day but suspecting the parents was not one of them.
Any cop with a brain is going call for an immediate search
of the area...not "babysit" the Ramseys while waiting for
a phone call. They were just plain stupid and gave the
perp the time he needed.