Just that the tape was a certain brand that was also found in the Anthony home. That's why the defense tried to pin it on the grandfather. But there was no other evidence that connected him to the crime. There was no DNA of anyone on anything (even Caylee), aside from the little piece (not even a full profile) from one of the forensic examiners on the duct tape. Also, she was dumped with several items from the home - blanket, laundry bag, etc - so it's not like it could be a stranger.