The documentary's interviewer has the newly found letter and envelope with the same misspelling and block font style as the cadaver note / envelope. The interviewer ambushes Robert Durst by first asking him several "softball" easy questions about some photos and then just hands Robert the newly found letter and envelope, and lets them hang there for Robert's reaction - well, it is frighting to watch Robert as he puts it together, he begins to burp, almost vomit, and puts hands to his face, he then 'rights himself" and denies that he wrote it. The interview ends, and everyone tries to make light chit chat (it is really weird and scary - frighteningly scary).
Robert then goes into the bathroom, but is still mic'd. Here is what was recorded... it is Robert, breathing heavily at times, making odd noises, running the water and slowly talking to himself, here is what he said;
There it is, you are caught
You're right of course
But, you can't imagine
Arrest him
I don't know what's in the house
Oh, I want this
What a disaster
He was right
I was wrong
And the burping
****then what sounds like Robert throwing up*****
I'm having difficulty with the questions
What the hell did I do
Killed them all, of course