Dexter was an elusive vigilante serial killer in Miami, known as "The Bay Harbor Butcher," who primarily targeted and killed other murderers who had escaped justice. His detailed method of killing allowed him to avoid the justice system by getting rid of any potential evidence. The irony of Dexter's life was that he worked closely and affably with homicide detectives and a forensic specialist. Dexter, himself a blood spatter analyst, collected, processed, and interpreted evidence for the Miami Metro Police Department. He often used his ability to access police databases or tamper with evidence for his personal advantage.