I have been watching this thread and not participating much because I've been sitting on my hands and actually, still am, to a degree.
I originally was thinking pretty much what everyone else has been thinking and then I had an "aha" moment when I truly believed that she had just up and left for safety reasons. However, I backtracked on that due to comments about her son and the type of relationship she has with her son. I get a woman feeling unsafe and leaving with a baby, but, I can't reconcile, leaving with one child, while leaving the other behind. I do not believe she would do that.
I can't help but think that foul play is at work here. Quite frankly, I can't imagine what else could be happening.
Would someone bring me up to date on one thing please. Do we know if LE has forensically gone through Heidi's apartment with a fine tooth comb? My feeling is that whatever happened, occurred in that apartment.
There has to be security video somewhere that shows her leaving the building - one way - or the other. I think LE is waiting on phone info. I know it takes a while to get that information from the phone companies but, as in so many other cases, phone pings tell the tale.
My final comment is that I don't believe this is a random crime, it was either planned or something escalated and things went very wrong very fast.
MOO