Or Melanie Stanton could have been "silenced". If I recall, she didn't want to come forward about the scream at first. When questioned further about it, THEN she said that maybe it wasn't a scream but rather "negative energy" from JBR.
I believe she heard the scream, then got leaned on to shut up about it. Leaned on so hard she eventually moved away from Boulder.
And what about her husband? He also claimed to have heard "metal scraping concrete".
Of course, it IS possible it was PR who screamed, and yes, realizing what she'd done would certainly do it, but if the scream was from the bathroom on JBR's floor, I doubt Stanton would have heard it. There was a vent in the basement, right outside the wineceller, and I believe LE had done sound tests to see if a basement scream could be heard across the street (it could). I've seen conflicting reports about whether the same scream could be heard on the third floor, in the parent's bedroom. A child's scream would certainly wake up sleeping parents, especially so soon after they fell asleep. Not to mention if PR screamed by JBR's room, BR would have heard it.