Quinn hires Liddy to look into Dexter's past. Liddy discovers Lumen and takes pictures of Dexter and Lumen disposing of Cole Harmon's body, though he is not sure what was in the bags. Liddy, assuming the bags to contain either drugs or a dead body, attempts to report to Quinn, but Quinn ends the investigation as his feelings for Debra now have become serious. Liddy refuses to stop, believing he has stumbled upon criminal activity that he can use to reintegrate himself in the police force. After Dexter realizes he's being watched, Liddy sets a trap in his van and manages to apprehend Dexter. Having phoned Quinn, ordering him to come to the van's location, Liddy attempts to force a confession out of Dexter in order to regain his (Liddy's) reputation and status as a police officer. However, Dexter manages to fight back and in a short struggle, kills Liddy with his own knife in self-defense. When Quinn arrives at the van, he tries calling Liddy and shortly walks away, but not before a drop of Liddy's blood drops onto his shoe. Dexter then disposes of Liddy's evidence. The police find Liddy's body, and Quinn is considered a suspect, due to Liddy frequently calling him and the blood on his shoe. Quinn refuses to say what the nature of their relationship was, likely to protect Debra. Realizing how much Quinn means to Debra, Dexter sabotages the blood test, making it appear that it was not Liddy's blood on Quinn's shoe, clearing him. Quinn later thanks Dexter for this, although Dexter pretends to not know what Quinn is talking about. Additional characters, introduced in season 6 Brother Sam Mos Def Brother Samuel Wright is a born again Christian and a reformed criminal who runs an auto-body shop in Miami where he tries to extend his good luck to other ex-convicts by giving them a place to work. While Dexter is skeptical of his reformation, Brother Sam proves himself redeemed and Dexter befriends him, introducing him to Harrison. At the end of the fifth episode, Brother Sam was shot in his garage by Nick, an ex-gang member who wished to return to the gang. On his deathbed, Sam tells an angry Dexter to forgive Nick for shooting him. Travis Marshall Colin Hanks Travis Marshall is a researcher in artifacts, professionally a bible restorer who is tied to the Doomsday Killings (DDK, also