We don't know if these words were said sequentially. Could be only part of another utterance like "Guys! Give me that phone!" Lib throws it and accidentally falls, or he grabs it and she falls. . Maybe he's on the lam hiding from le or something. Abby hangs around trying to see what happemef to Libby, if she's alive, if she can save her.
At this point maybe BG has the phone md orders Abby down the hill. He forces her to drag Libby's inert body a ways up the creek and then kills her. He left little dna at the crime scene since Libby passed from injuries in the fall, and he either shot or sliced Abbys throat.
It would be simple. But what gets me, why would they not tell the public in this scenario? Therefore, I think while it's plausible, it's probably not the key. How neatly, I think publicity is holding back a lot of details because of the the firestorm that will ensue. Too late though, the eyes of the world are on Delphi. Time for ground truth.
Nothing personal, but I'm not sure this theory holds water. We don't know with 100% certainty whether he said "guys...down the hill" sequentially but we have a person who has supposedly listened to the entire unedited sequence, Abby's mom, who said that there are only a few seconds of pause between "guys" and "down the hill." So that's a pretty good source indicating that there's not a lot of dialogue or time in between those words. IMO based on what she said, it's basically one sequential phrase. The gap between the two, she says, is one of the girls saying "huh? hm"
This is about 20 minutes into the linked interview:
AW: There is less than a 3 second gap in Guys down the hill…. There’s not long minutes of pause, there is seconds of pause.
Source:
We also know that from TL's interview in The Carroll County Comet Q&A that the location where these words were uttered was the south end of the High Bridge. It wasn't "guys..." somewhere else and then "down the hill" in another location. County Sheriff answers double homicide questions from readers | Carroll County Comet
And we know from TL's interview in the HLN podcast Down the Hill that "guys...down the hill" is the only audio from the man that he's aware of. So if BG said "Guys! Give me that phone!" and then at some later point says "down the hill," we know from TL's statement that LE is either unaware of the "give me that phone" part (or whatever could be posited) or this part is unintelligible. Chapter 10: Four Years - Down The Hill: The Delphi Murders - Omny.fm