Motive.
I need to keep an open mind.
Some people interview badly. It's just that not everybody who interviews badly gets his or her car impounded by LE.
But still, she could've turned her back (hello, interview) for one second and he could've been plucked off the idyllic streets of Anytown, Colorado. Abductions happen. Abductions leave people shell-shocked. SB in the case of missing mom HB. The spectre of blame, if you're innocent and dazed, must be awful in cases like that.... when your brain is numb and won't let you put two sentences together.
But it's also true, short of premeditated murder, that things happen. Accidents, temper, fear, it's what happens next that is most telling. And it looks to me, in every case I've followed recently, the next step is SELF-PRESERVATION, over all other concerns. "I can't get caught." Hide the evidence, divert, distract, create drama here in the hopes no one will look there.
If just one, there are too many cases of missing and murder children, wherein a caretaker does it, deluded into thinking the other person (boyfriend, girlfriend, husband, wife) will turn to them in their grief, bring them closer.... a sick twist on an old fairytale.
It takes a special (cold, wicked, shallow) kind of person to see a child merely as a means to an end. Susan Smith.
I hope that's not what we're looking at here.
jmo