Fwiw and I understand that everyone has bias, but I don't have a dog in this fight ( so to speak ), except, as someone has mentioned, the hope that Venus is still alive and found that way and that the truth is revealed--sooner rather than later.
That said, why is Doug in Michigan all of sudden? Sure, he says it's to be near his children, but it sounds like he doesn't have access to them and they might actually be in hiding?
I might be among the minority here, but I still hold out hope that Venus is alive and that if Doug was involved in her abduction, he did not go so far as to commit murder. (It's not conclusive of anything but perhaps indicative of someone not of a mind to possess lethal weapons that there are no guns (or knives?) listed on the inventory of the search warrants--they would've known about and likely seized any registered weapons Doug possessed, and any unregistered firearms would also have been seized (and Doug arrested for possessing)).
Also, does anyone know if any search warrants were issued in Michigan, perhaps for family/friends of Doug?
Back to the point of Doug returning to Michigan post-haste--if Venus was abducted and Doug was involved in Venus' abduction and Doug and perhaps any accomplices were not the sort to commit murder, it's possible that Doug returned to Michigan to be nearer his captive?
I hope the MSP have GPS trackers on any vehicle Doug has access to but even that isn't foolproof. And there's no way the MSP or any law enforcement agency has the resources to have Doug tailed by actual officers 24/7.
So maybe/possibly Doug and his accomplices abducted Venus and then took her somewhere and Doug is up here to make sure she doesn't get away, keep on eye on the situation etc?
THIS IS ALL SPECULATION!
In Michigan, something like 90% of the population lives below US 10, which means there are endless acres in the Northern Lower Peninsula and the Upper Peninsula to disappear into.
However, going back and forth between St Joseph County and upper Michigan would likely take too much time and attract the attention of LE.
So, if it is an on-going abduction/kidnapping situation, I'd think Venus is within a reasonable, sneak out and sneak back home distance of where Doug is currently staying.
That's all.