Ya, not really convinced. To me that doesn't prove they were speaking of the trailer. Everyone involved was in denial. CN knew exactly what was in that trailer. For heaven sakes, she helped clean out the dang incinerator! What did she think it was "burned metal, metal ash?" Oh right, she corrected herself and said "to melt metal" which we also know is BS. Why was there metal grommets and teeth fillings still in the incinerator? Because it didn't melt it either.
She didn't get TB'S DNA on HER gloves by just helping hitch and unhitch the incinerator trailer. Again, she needed gloves to do that? I think MY choice would be lined work gloves, not thin Nytrile gloves, if it involved trying to shift the trailer to line the hitch up. But that's stupid too, DM had a backup camera on the Yukon. We hitch and unhitch in the dark with ours with no problems.
MOO and JMO
ETA: if you (no one in particular) haven't ever been on the witness stand, this is what defense lawyers do. They twist words, add words, put their theories into a phrase. It's up to the witness to listen carefully to what's being said or asked. This is how the defense lawyer gets the witness to trip up.