When I used the word "insensitive" it's difficult to explain but what I was getting at, there's room for a whole lot of imagination, which in my opinion can easily cross the line and not serve any useful purpose.
However to the point of might've the recording occurred -- it would seem reasonable to assume anyone with the fortitude to video their killer would also identify specifically who it is, if they recognized the person/s. That would also become very strong evidence that shouldn't require weeks and months of investigation involving tips and billboards etc, in order to identify and lay charges against a suspect.
Since two months have now passed, then I'd suggest if we prescribe to the theory that Libby recorded the entire tragedy, then we must lean towards the murderer being a total stranger and whom neither of the girls recognized.
Otherwise, surely they would've revealed the persons identity by referring to that person by name "XXXXX why are you doing this?" or at the very least "I know who you are, you're so-and-so's cousin/brother/uncle/dad, etc..".
When anyone is taken by surprise and in fear, the identity of the culprit/s is often amongst the early verbal interactions. I suppose that's natural, that we'd want to know who it is, who it is who intends to harm us in order to use that information in an attempt to turn the situation around. MOO
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