to Rita since Lila had broken into her home. Dexter went to Jimenez's cabin at night and attempted to dispose of his body. Later, Jose Garza came looking for Jimenez, because he wanted to get his cocaine, but was caught by Dexter and killed at the cabin. Since Santos killed Laura Moser, he was responsible for Dexter turning into a serial killer despite that Dexter usually only kills dangerous criminals who commit murder. Ken Olson (Silas Weir Mitchell) is a wannabe vigilante inspired by the Bay Harbor Butcher. He has successfully killed two criminals. One was a drug dealer he ran down with his car (Olson stole his drugs afterward). The other was an abusive husband whose anger was provoked when Olson slept with his wife, who was pushed down a flight of stairs. His third attempted victim, a robber who hurt Olson's mother, escaped by stretching out the rope Olson used. Dexter originally planned to stop Olson without killing him. Upon learning of Olson's first two victims, Dexter decides that Olson must be killed. Dexter did not obtain a blood sample from Olson. He left his dismembered remains inside a train car to send a message. Under Lila's influence, Dexter said he "had" to kill Olson (out of necessity) but did not "need" (feel the urge) to kill him. Juan Ryness is a pimp who murdered one of his prostitutes; he was Dexter's fourth human victim. He is arrested, but let off due to a faulty warrant. When Tom Matthews visits Harry Morgan during Debra's birthday party to inform him of Ryness's release, Harry loses his temper and later tells Dexter that he was right in training him. However, Dexter finds and kills Ryness himself; Harry finds his son standing over Ryness's dismembered body. Dexter later learns that Harry committed suicide days later, rather than dying of natural causes as he had previously believed, and guesses that he was unable to face the reality of what he trained his son to do. Jose Garza, or "Christopher Harlow", is a murderer and drug trafficker connected to Santos Jimenez. Initially supposed to make a deal with Jimenez for Garza to buy a quantity of cocaine, he was surprised and angered when Jimenez did not show up, and texted Jimenez's cell phone. By this point, Jimenez had been killed by Dexter, and the cell phone was in Dexter's possession. When Garza announced