: Aggie’s dying grief and anger cursed her executioners to rise as ghouls every year, unable to move on as long as her spirit remained restless.
"Fun Fact: The zombies in ParaNorman were created using the world's first full-color 3D printers for facial animation, allowing for incredibly detailed skin textures and wrinkles." paranorman zombies
Judge Hopkins and his mob aren't attacking the living because they are evil. They are trapped in a purgatorial loop, forced to re-enact their worst sin every year. They are cursed to chase Norman because they must find the witch to apologize. They are carrying the weight of their guilt in their rotting flesh. : Aggie’s dying grief and anger cursed her