Leonis is a Character on Showtime's series DEXTER. In former times, he used to "fix problems" for James Doakes, who was in Special Operations. Leonis is now a travel agent, working for his father-in-law.
Suspecting that Dexter Morgan is involved in nefarious activities, Sgt. James Doakes breaks into Dexter's apartment to look for evidence. He discovers and steals Dexter's blood-slide trophies. After he hides them inside the trunk of his car, Doakes flies to Haiti. There he meets with Leonis and makes arrangements to have the slides analyzed discreetly in a local hospital lab. However, while Doakes is out of the country, the slides are found and seized by the FBI. This makes Doakes a prime suspect. Later, when Maria LaGuerta flies to Haiti, she learns from Leonis of Doakes' plan to examine the slides, and relays the information to Special Agent Frank Lundy. This causes Lundy to briefly doubt Doakes' guilt. In the end, when Doakes' body is found at the cabin, along with evidence (planted by Dexter), he is officially (and falsely) identified as The Bay Harbor Butcher.