As Sile replied, it has been rumored that his grandfather may have been his actual father. I must of missed the show where the DNA test was talked about though. I am pretty sure no one has talked about whether or not a genetic genealogy had been done. I would assume it has been since there are so many questions still unanswered. Bundy could never talk honestly about his childhood, except during the last few days before he died and his mother did the same. All she ever claimed is that it was a military man passing thru town sort of deal. It has also been rumored it could of been a higher up in their church. The only known part we know for sure is that she never wanted to keep the baby, but her father forced her to. Her parents supposedly pretended to be Bundys parents and his mother his sister. Supposedly he was told the truth by a cousin when he was a teen. We also know that the father/grandfather was an abusive man and his wife had mental issues. After Louise had Ted, unknown people in the family felt she should leave with Ted and move from Philly to Washington State where she had a cousin. Lots of stories about that, but nothing concrete from Ted or Louise.