About the "military precision" the Sheriff said:
If it was so precise, how come the van was found so quickly and not destroyed or disposed? Being fast does not make it "military precision." It just means they went in, and got out. Most home invasions/burglaries are done in under 5 minutes: see a home, check for nosy neighbors and dogs, knock on the door, kick the door in, run inside, grab as much as possible, run out and keep going. MOST of these do NOT happen at night because most people are home.
The Discovery Channel had a show called "It Takes a Thief" and they showed how easily break ins can and do happen.
I originally said this had to be some sort of inside job or done by someone who knew the victims and the layout of the house -- guessing that, I was assuming they'd know about the cameras and know to GET RID of the van, ESPECIALLY after it was flashed everywhere almost immediately.
Thankfully, they were stupid criminals who did a horrible crime, and were stupid enough to leave the evidence in plain sight.