But the family is not hunkered down there. They’ve been in a different location.
And they didn’t just take pictures, they took both cars.
In my scenario- with SIL as perp, they stage scene to make it look like a kidnapping. Took cameras for that. They had to have known of the camera on roof but didn’t take it, because they knew no subscription and they had already set the scene enough. Why leave a back door open for any other reason? In my scenario, they planted the watch and blood.
A ransom note only required a VPN. They can use the website contact form and VPN anywhere. Bitcoin wallet is anywhere. Both are writers. Both are local as Harvey Levin pointed out.
In retrospect, it makes the most sense, absent motive for me, but in plenty crimes I see no motive.
I do think evidence will be research on how to do things recovered from phones.