I use pre cut strips of the stuff to seal duct pipe in close quartered areas where it's not possible to rotate the whole roll around the pipe. These strips always pick up dust, insulation, sawdust, etc. and are difficult to handle. It's very possible some particles from the location of where the duct tape was applied to Laci's body are still present on the tape. If those particles match particles or fibers in SP's truck, house, warehouse...Bingo.
Bingo would be a good thing! I'm curious as to what other items they may have found in the bay. If they did find cement anchors....that'd be another bingo.