Julie Piotrowski is a character in DEXTER.
She was an 18-year-old prostitute under the employ of Juan Rinez, a pimp that Detective Harry Morgan had been chasing for years. Harry's interest in catching him was due to her violent death, which was caused by multiple blunt-force trauma to the back of her skull. He however always escaped the law and always evaded his grasp. Dexter Morgan, Harry's adoptive son, sought approval from his father for killing a man that Harry hunted for so long... so Dexter tracked down and killed Rinez, though the sight of seeing his son dismembering the corpse drove Harry into killing himself, which Dexter did not find out about until long after.