I’m sorry I don’t agree. These are interpretations, not “facts.” The re-enactment showed the bindings were loose. Maybe she was holding the blade differently before death and it slipped.
Here's the video of the expert testimony:
https://www.nbcsandiego.com/on-air/as-seen-on/knifeevidence_San-Diego-475576173.html
It looks pretty obvious, but we're open to hearing your alternate explanation. TIA