I can't help but feel that the battery & registration were taken, as an impulsive move by the perp(s), to make it more difficult should someone (land-owner, etc) come across the vehicle, to either drive it out of the field and report it to LE, or read the info on the registration and immediately see that it was registered to a woman who everyone knew was missing. Also, possibly Perp(s) aware field scheduled to be burned and removed battery to help ensure vehicle remained there (as opposed to someone finding it and driving it out) and would be destroyed in the burn.
Last night I was reading on the Belize newstation's FB page, some comments from someone who mentioned the bodies had signs of trauma to the head (like hit in the head, knocked out, etc). Don't know the validity of these statements, tho, of course. But it would make sense. Belize LE have stated the COD is manual strangulation but there are very likely other details about the autopsy (eg: signs of trauma to head, fracture to skull, etc etc) that they're just not going to release to the public. The only way I can see DD having been strangled was if he was unconscious to begin with.
And just speculating, it would be much easier to knock someone out with a blow to the head if you were a person the victim trusted. As a victim you'd be much less 'on-guard' if approached by someone you know.
I'm curious to know, if true, why JD was months behind on rent. If they were such good friends from back home, why would you do that to a friend? Or is it because they're a friend and you figure they'll keep cutting you some slack? Was JD hurting for money? Was he not paying rent because he didn't have the money or did he refuse to pay rent for some other reason? (eg: he felt FM owed him for something, at least according to him). Was JD not working? Got himself into some bad financial deals? Did his GF work? (she reportedly lived with him and her 2 kids).
I wonder what the 'laws' are in Belize, with respect to not paying rent, is there a formal eviction process?
if there is a formal eviction process, would that apply to a situation of an ex-pat vs another ex-pat?
Did FM feel the only way to end JD's tenancy and get him out of her home was to sell it?