So she stayed under water for weeks how exactly?
>Third, there are repeated references in the comments to Laci Peterson having been weighted down by anchors. No anchor attached to her body was ever offered as evidence, nor were any cement anchors recovered from the bay where her body was found ever entered into evidence. Laci Peterson's body having been weighted down by anchors of the type Scott Peterson made was simply more prosecution speculation without any evidentiary foundation whatsoever.
>So she stayed under water for weeks how exactly?
That's precisely the point.
The prosecution speculates that Laci's body was dumped in the bay on Christmas Eve when Scott Peterson claims he was fishing. The prosecution then, to support its unproved assumption, further speculates that her body must have been weighted down.
Occam's Razor suggests a simpler explanation in the absence of any anchors being recovered: that her body was dumped at a later date -- and the ME's autopsy does not tell us how long her body was in the bay, thus never eliminating this as being the simplest explanation.
Since Scott Peterson at such a later date was already being tailed by police, Occam's Razor is exculpatory.