They find his real dad in the first season, like the 9th or 10th episode or something. Joe Driscoll I think his name was, and Dex, Deb, Rita and Brian cleaned out his house when he died. Dexter and "Rudy" dumped his ashes at the bowling alley.wasn't dexter's mom a prostitute? they probably don't even know who his dad is.

Way too messy to call GOAT. So many innocents got clapped in his fukkery. He's also been violating Harry's code from the start. Rule 3 was going after killers that evaded the justice system. Dex was tanking cases, obstructing the law, and even broke a killer out of prison to satisfy his blood lust.