Welcome to Harry Potter Answers. What would you like to know?

It was actually due to Priori Incantatem, It reversed The Dark Lord's murders cast by his wand. First of all, it was not their ghosts, simply memories, or to use a better word, imprints. Not quite ghosts. Anyway, the spell Priori Incantatem normally shows what spells the wand had cast showing all the people Voldemort had murdered in reverse order, Cedric Diggory, Bertha Jorkins, Frank the groundskeeper, and Harry's parents.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.