I'm thinking about the video and audio recordings LE has, and the statements they made. They said
- they are not sure if the recorded voice belongs to the suspect caught on video on the bridge (BG)
- they said about BG that he "at least participated" in the murders
So
- they have seen BG on video but never seen him speak (otherwise they'd know it is his voice on the audio)
- they have seen him do things that show he was "at least" taking part in the crime, but he did not say anything on camera while doing whatever he did
- the crime did not happen on the bridge, so they must have video of him after they left the bridge and arrived at the location where the crime occurred that shows that he is taking part in the murders
- I think it is therefore fair to assume that Libby's phone was not in her pocket or otherwise hidden or lost etc (only recording audio but no picture) after they left the bridge and when the crime occurred, as the video showed BG participating in the crime. Her phone must have been close by and in the open while the crime occurred, at least for some of it.
LE said they were concluding BG's participation in the murders based on the 'totality' of the evidence at hand.
I personally believe the video was shot by Libby ahead of actually meeting face to face with their killer.. it was taken from a distance, which is why, I believe, the quality is so poor.
The background noise we hear (prior to the FBI removing it on the audio recording found on their site) sounds exactly like a recording made while in a pocket while walking. I say this based on experience, because someone pocket-dialed me by accident, unbeknownst to himself, while he was walking one time.. the call went to my voicemail.. when I listened to it, I had no idea what that sound was.. later found out it was just the sound of 'walking' while phone was in pocket.
LE would have timestamps on the video/audio recordings which would enable them to surmise that the timing made sense for the person pictured in the video to have been present at the time of the audio saying, 'down the hill'.. and based on other evidence they have, such as the person who said they were in the area around 3pm and the girls were not seen, the autopsy estimate of time of death, etc. Because the person pictured in the video was not recorded while actually speaking, police are not able to say for sure whether that voice belongs to that BG, but they CAN say that everything adds up to him at least being present at the very time when the audio was being recorded, and therefore they are confident to report that this BG 'at least participated'? They are being very careful with their words, knowing that everything that happens now can potentially be used against them when the case eventually goes to trial.
I am still confused about the phone. Was it in a bag (Libby was not pictured that day and so we don't know whether she had a bag with her, and if so, was the phone in the bag, and it was later found discarded and that is why LE is asking if anyone perhaps saw a person discarding a bag?)? Did Libby discreetly toss the phone before the girls were murdered, without the perp ever knowing of its existence, and it was subsequently found by police? Is it like some have surmised, that the recordings went straight to Libby's cloud, and the phone itself has never actually been retrieved? Was the perp secure in believing there was nothing incriminating to himself to be found on that phone and so he knowingly felt there was no risk in leaving it behind?
All just moo.