It was the father who sah the alarm blinking. The mother was out and came home later. Neither one checked on the child
Now, notice the word "think". On the average, it would be more normal for the Mother to say something like " I KNOW someone took her out of her bed...they would have HAD too."
When a person says "I think"...it's like saying "I think I left my sunglasses on the counter, but I'm not really sure"..
Why isn't she SURE?
The house was unlocked, so the neighbor just happened to wander in to abduct the child? He must have been checking every single night, till ONE night, eureka! The door is unlocked! .... Naahhhh.
sw