I'm following too and I too find this case is very strange indeed.
Since searches for Maggie have stopped, I believe LE knows where she is....hopefully safely and alive (which at this point I believe).
I'm leaning to an event at home, a serious event, which resulted in the shouting/throwing things/ and the fire. But what that may have been, who knows?
Does anyone know who was home at the time? Were the two sisters there also?
LE isn't talking, and the gag order involved, makes me think this is a very private family thing, ...and that someone may have had a breakdown of sorts....I dunno.
What concerns me is the "criminal" investigation statement.
Just hope Maggie is indeed safe and that the Long family is/will be ok.
eta...might the gag order be HIPAA related?