Confirmation from DeMuth's own report, and I quote:
"The duct tape found on the paintings has a different production period."
Fine and dandy. What he has confirmed there is that, indeed,
the Ramsey household had black duct tape on multiple paintings. Notice he did not say that the tape on the paintings was the wrong color, or even that it was not duct tape. So there you have that data point to consider;
black duct tape was in the house, but what was found was not from the same "production period" as the tape from the crime scene.