I honestly do not believe it was stupidity on the part of the PD. Boulder has an incredibly low murder rate with investigators who have little to no experience dealing with a crime scene such as this.
Put that together with the national attention this case got and you have a recipe for disaster.
The stupidity on the PD was not bringing in until much later agencies who had solid experience dealing with murder cases.
Secondly was the ego factor that got into the way. They knew the Ramsey's did it, they only wanted evidence that proved it and when evidence came up that didn't fit into their scenario, it was ignored, this greatly harmed the case. Add that to a prosecutors office that also was so sure the Ramsey's did it and ignored any information to the contrary and we have a murderer who is free to kill again.
First you say it was not PD stupitity and then you follow by giving two excellent examples of their stupidity plus the DA's office of course.
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Hunter was sure the Ramseys did it?