Batgirl #65 (2000)

Written by Andersen Gabrych
Art by Pop Mhan & Jesse Delperdang
Cover by Dustin Nguyen
Batgirl needs to know who her mother is - and there's only one person with that information. Unfortunately, he's her estranged father as well as one of the world's most notorious killers: David Cain! Don't miss "Father's Day!"