When I heard the unknown male voice on the 911 call I couldn't believe what I was hearing. I had listened to the call over and over again when I attempted my own transcription and was never able to distinguish any voices other than Shannan, Michael Pak, Joseph Brewer and the 911 operators. I had always felt certain that the only people in the house that morning were Shannan, Michael Pak and Joseph Brewer.
The audio in transcription in the link above was somehow cleaned up enough that I was able to hear what to me had been unintelligible before.
When I first heard the unknown male voice say something at 5:10 about a puppy, I thought that the voice was in the background of the 911 call center, but then shortly after I heard the Joseph Brewer say, "Come'on, I'll go upstairs, you leave" and the voice said, "I'll leave, too", to which Joseph Brewer responded, "
Everyone go upstairs". It is not transcribed but I heard "
Everyone go upstairs" perfectly at 5:26.
If it were only Shannan, Michael Pak and Joseph Brewer, why would he say "
Everyone go upstairs" if he were referring to himself, Shannan and Michael Pak, considering he was offering to go upstairs as a way to coax Shannan into leaving.
At 3:05 Joseph Brewer says, "We were
all doing all kinds of drugs". Who is he referring to? As far as we know Michael Pak was sitting outside in his car almost the whole time uninvolved in drug use, why would he refer to himself and Shannan as "We
all"?
At 13:17 Michael Pak says, "If we're plotting then why- why don't we
all..." You would not refer to yourself and one other person as "we
all".
There was at least one other person in Joseph Brewer's house, possibly more.
When I came to that conclusion it dawned on me that it is very possible that other young men from Oak Beach were also at Joseph Brewer's house.
I believe parents who love and care about there children would go to great lengths to protect them from something they may have done wrong. (If you believe OJ is innocent and I Can Prove It by William Dear, think OJ Simpson and Jason Simpson)
On another note At 8:49 Michael Pak says, " I don't know why... why are you doing this?" to which Shannan responds, "Alright, I'll say I was lying". There is a noticeable disconnect in the conversation at that point, and I feel like there must have been something said in between those two statements that was edited out, because Shannan's response doesn't seem to make sense in that context. This would go toward your theory about the 911 not being in it's entirety.