GA had to have brought the duct tape to the command center. CA also testified George was the only one who used the duct tape. They lived in Ohio when ICA was just a child, and the duct tape was manufactured in Ohio, where GA probably bought it long before Caylee was born. I believe it was George's personal duct tape, as you put it. It was also on his gas can. And he is obviously very particular about his personal things.