Thomas - "I remember seeing it that Werner Spitz concluded, I believe, what was believed to be stun gun marks may have been a patterned object, if I recall correctly, or I think another explanation was on her back lying on some sort of object."

Stun guns leave "patterned" marks - -

If she had been lying on an object after death, the marks would have been white, not dark - - - that's how lividity works.

She wasn't lying on her face and back - - - clearly Thomas and Spitz just don't have the answer.