I agree with you that we disagree. I don't think KC did anything prior that was remotely close to murder and I cannot imagine any parent jumping to that conclusion that their child murdered her child from the get go without checking into it further. Remember this was their first exposure to the car and the smell. The minute CA heard that KC did not know where Caylee was, she picked up the phone and called the police and reported it and the smell.I disagree. You have a stranger who owns a towyard. Then you have grandparents who were practically parents who hadn't seen a baby in a month, one of whom is former LE, the other of whom is a R.N., both of whom knew they were smelling decomp, and both of whom knew their daughter had been crossing serious boundaries and committing crimes for years. IMO it's bizarre under those circumstances that they weren't on the phone to LE screaming their heads off.
As previously posted, I do not support much of the A's behavior beyond this, but their intial actions seem in line to me.