<P> Meanwhile, Dexter's relationship with Lila becomes more romantic as she shows him how to accept who he is; this further hurts Dexter's relationship with Rita . Dexter learns that Lila is a pyromaniac, at one point purposely setting fire to her apartment and feigning innocence to draw Dexter back to her . When she starts to follow him obsessively, he takes measures to distance himself from her, eventually foregoing their relationship . Realizing he is developing genuine connection to Rita and her children Astor and Cody, Dexter returns to them . Lila is furious and begins to track Dexter's movements, while also dating Detective Angel Batista . Dexter warns Batista that Lila is not to be trusted but he dismisses the concern . Later, Lila brings rape charges against Batista and tells Dexter she'll drop them if he returns to her . Debra investigates Lila and finds that she is in the country illegally, threatening her with deportation if she doesn't leave Miami . </P> <P> Dexter tracks down the men responsible for his mother's death . One is dead, one is in jail and one, a drug dealer named Jimenez, is alive . Dexter targets Jimenez and tracks down the dealer's secluded cabin in the nearby swamps, where Dexter kills him . Dexter is called away before he can dispose of the body, but feels confident that the cabin is remote . When he finally goes back, he is unaware that Doakes is following him . Dexter subdues Doakes and locks him in a makeshift cell within the cabin, admitting to the sergeant that he is indeed the Bay Harbor Butcher . Dexter decides that he'll escape the law by convincing others that Doakes is the butcher . He kills a drug lord in the cabin in front of Doakes, shocking the police sergeant . Seeing Doakes' reaction to his actions reminds Dexter of something Harry said days before he died . Dexter suddenly realizes that his father committed suicide because he was ashamed of training Dexter to be a serial killer . Horrified, Dexter tells Doakes, "I killed my father ." </P> <P> While Dexter considers that he must be held responsible for his crimes, Lila takes the GPS device from Dexter's car and uses it to locate the cabin . She finds Doakes, who explains that he is a prisoner of Dexter Morgan, the Bay Harbor Butcher, and needs help . Deciding she now understands Dexter and must help him, Lila leaves Doakes imprisoned and then lights the cabin's gas stove and opens a propane tank . She leaves and Doakes fails to escape, dying in the explosion . Finding Doakes' body and the other evidence Dexter left behind, the FBI concludes that Sgt . Doakes was indeed the Bay Harbor Butcher . </P> <P> Lila admits her actions to Dexter and reaches out to him . Although he is glad not to be going to jail, Dexter did not intend to kill Doakes since he didn't fit the requirements of "Harry's Code ." However, since Lila is a murderer, he plans to kill her since she is too dangerous to his personal life . He pretends that he wants to run away with Lila, but she realizes the truth and kidnaps Rita's children Astor and Cody . At the same time, Debra is on her way to leaving Miami with Lundy rather than letting their relationship end, but then misses the flight when she learns that the children are in danger and Dexter needs her . Lila lures Dexter to her apartment and then sets it on fire with him and the kids still inside . She leaves, sure that they will all die, but Dexter and the children escape . Debra arrives just as Dexter has gotten to safety and decides to remain in Miami after all . </P>

Who gets blamed for the bay harbor butcher