The season 1 finale of Dexter: Resurrection suggests that one of the members of Prater's kill club, who was previously thought to be dead, may actually still be alive.
Although Prater didn't survive the Dexter: Resurrection season 1 finale after killing Angel Batista, his hired hand, Charley, did, which means she is one of the few people who know Dexter's a serial killer . While Charley is a loose end, she's not as much of a threat as this particular character, who was pronounced dead but may not be due to a clue in the finale.
Lady Vengeance's File Is Still Marked As Active In Resurrection Episode 10
Mia Lapierre, aka Lady Vengeance, (Krysten Ritter) in Dexter: Resurrection season 1, episode 4
Leon Prater kept files on all the killers he kept in contact with as leverage if