This is a good point. In reading these threads, one item really stands out to me. It seems that when KB heard from her son that Holly was "walking" into the woods with a stranger, and CB thought it was her boyfriend with her, I'd think that KB would clarify before assusming that her daughter is being kidnapped, which was apparently the case -she exclaimed something to the effect of it being a dire circumstance, due to the boyfriend being across the county hunting.
Here's the rub, as I see it: There are 3 possible perceptions that CB could have had re: this incident: Firstly, it wasn't anything that piqued his curiosity at all, he just assumed the HB and her bf were out for a stroll, but in that case, why call his mother?
In the second scenario, he knew that something was terribly wrong, but this doesn't seem to hold water. He's already said that he didn't know the BF wasn't there, thought that it could be him; he didn't, apparently, call in a panic to his mother that Holly was being kidnapped, didn't call the police, didn't call out, didn't run after her, etc.
In the third scenario, he thought it odd, but didn't sense anything outright alarming, such as a real "dragging" situation, a gun, a struggle, etc. In this case, I can see that he might call his mother out of some faint reservations...."that's Holly, she doesn't seem to be struggling, but it doesn't look exactly like her BF, and what on earth are they doing out for a stroll at this hour".... In this instance, I can see him calling her for some reassurance. However, if this were the case, wouldn't it be quite odd for KB not to at least say something like, "CB, are you sure that it's not her BF?" -or, "Her boyfriend was hunting this morning out on Grandma's property, did you see him come in?" -or at least questioned him regarding the situation -is she struggling? what does the guy look like?" to determine that it wasn't her bf, a friend, etc. However, from what we know, it seems that she immediately concluded that Holly was being kidnaped.
It does make you wonder if there wasn't something or someone that prompted her to immediately assume something nefarious. Also, though, it could be that there was more discussion on that phone call and I just haven't read it or that the whole conversation hasn't been released -just summarized by LE. It does make it difficult, though, to sleuth it without knowing.