Just a small thing, but regarding the car seat, in my opinion a car seat/carrier can be seen in one of the photos from hotel surveillance shown in this article - California dad arrested at border after stabbing his kids to death with wooden stake in Mexico | Daily Mail Online I can’t see the baby in it though and wonder if she is in the green tote maybe?
It's hard to tell, it almost looks like I can see her feet sitting in the car seat. The boy would also need a seat I believe, so maybe that's the confusion as press was calling him a she at the beginning. One of the 2 was in a box from what was stated. Or that wasn't fact either.