In all fairness, maybe this is like someone not going to the hospital when you have chest pains. Or throwing out your husband when he comes home smelling like perfume and with lipstick all over his shirt.
It is MUCH more likely that the chest pains mean a heart attack or your husband is cheating than your daughter MURDERED your grandchild and you just smelled the child's body. Who could even imagine something like THAT happening to someone you know, much less to you?
Even when you have every symptom for a heart attack you've ever read about, how many of us talk to co-workers, friends or relatives hoping they will say it is indigestion instead of going to emergency rooms? Cindy talked in the first place to either be given reasons the situation was ok or to be told things were bad and get pushed into doing something. Since Cindy never talked about Casey or Caylee before (despite Casey's lies and theft) opening up enough to say she was worried after June 15 must have meant Cindy was upset.
The workers might have talked to each other, but might also have thought they were being overly imaginative. I've been in situations where I didn't react and should have. I've also been guilty of being too imaginative and looking foolish.
Most of us,just plain don't expect the very worst to happen to us, even when it is something common like heart attacks.