So...we can talk about all the evidence they need to bring together and analyze.
The surveillance video, obviously. (The judge will get a great copy, I'm sure).
Fibers, DNA, etc, from home, and more than 1 automobile.
Utterances and behavior/whereabouts of all parties, public or made to LE.
The photographs taken by LE on the night of the disappearance (not protected speech if it is a person).
Phone and cellular records from all family phones, phones of anyone else who might have fallen under suspicion. House phone records if any.
Computer history and hard drive analysis from home computers, perhaps work computers, and from various devices.
Google location and maps services. GPS.
Security camera videos from all over the region, as turned in by the public.
Some found objects.
Utterances and behavior of all parties, public or made to LE.
Statements from neighbors, others, who might have knowledge of what led up to this point.
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Also perhaps: bank accounts, credit card statements, physical inventories of the home, educational data, and more.
Each of these areas probably need 1 lead person and some supporting staff, and then they'll start pasting it all together. I have my own view about what would be damning enough to lead to charges, would love to hear others'.