I have always felt that Holly did not scream while she was at her own house. The screams were not at the beginning of what happened, but towards the end.
That makes sense too... You wouldnt scream (describd as blood curdling screams, meaning more than one scream) and then quietly go back into your garage and then walk away with someone. But half a mile away from the house when the guy tries to do something... thats when she screams. The neighbor was also outside versus if Clint were far away and inside.
I had assumed that the scream happened later in the episode as well because it would explain why a neighbor heard a scream(s) but not CB. After the last couple of interviews with the Bobo family, I now believe the scream came from the Bobo home but it is debatable when the scream happened and here is why. KB says that when the secretary had come to tell her that a neighbor heard screams coming from "the house", I can only assume the neighbor had called KB because it came from her house, not the neighbors house. When KB was told of this, her motherly instinct told her that something was wrong. CB had said he talked with his mother in between seeing silhouettes and seeing HB walk away with camo man. Here is where it becomes confusing to figure out. If the neighbor called about screams before KB and CB had talked, before CB sees camo man and HB walking away, KB would already be concerned and would probably ask CB to see what he can figure out is happening. If the neighbor calls KB after she and CB had talked,
KB would already have a level of concern and hearing the neighbor call about screams from "the house" would be extremely concerning. The X factors in all of this is how quickly after hearing screams did the neighbor call to KB school and how quickly was KB able to learn that camo man was not DS.
1. CB was informed about screams coming from the house before he saw HB and camo man walking away- If this was the case then it is hard to believe CB did not try to at least see what was happening at his house. We do not have enough info on this to draw conclusions to this scenario, this part of the story is unclear.
2. CB sees them walking away and then his mother later tells him that a neighbor heard screams coming from the house- CB was fully aware of HB presence at home with who he assumed was DS at this point in time. In this scenario, CB is awake and HB and camo man are walking away, but somewhere around the Bobo home the neighbor can hear screams. Again, there is not enough info on this to draw a solid conclusion.
I see that several people are even questioning if a scream had ever occurred and that is valid IMO. Taking it at face value that a scream did occur, I would probably wager the scream happened after CB sighting of HB and camo man, but somewhere much much closer to the Bobo property than the neighbor property, and in this scenario CB is awake at this point. But without knowing the actions of the Bobo family after the initial call between CB and KB, there is no way to finish out a scenario without making big assumptions.