Warning! This article contains SPOILERS for Dexter: Original Sin episode 4.Jimmy Powell was found murdered in Dexter: Original Sin, but the show has only hinted at whom the killer could be. Jimmy Powell, the son of Judge Powell, has been a major concern for Miami Metro and most of the cast of Dexter: Original Sin. Ever since he was kidnapped, the entire police department has been on edge, and all of Harry Morgan’s (Christian Slater) colleagues were focused on finding him. Unfortunately, they did find the young boy in Original Sin episode 4, but not in the way they were hoping to.

https://screenrant.com/who-killed-jimmy-powell-dexter-original-sin/