Jorge and Valerie Castillo

A husband-and-wife team of human traffickers who transport illegal immigrants from Cuba. If an immigrant cannot pay them, he or she is locked up in Jorge's junkyard, taken out on Jorge's boat and drowned. Dexter kills them both, but not before getting relationship advice out of them. Shortly after Dexter dumps their bodies, the Ice Truck Killer dives into the ocean and places Valerie's corpse in the junkyard, where it is discovered by the police, almost leading to Dexter's capture.

Norberto Cervantes

Norberto Cervantes was a professional hitman and assassin working for Carlos Guerrero. Norberto was dispatched to kill Officer Ricky Simmons when Carlos discovered that he was an undercover cop trying to infiltrate his organization, and Norberto did so by throwing him off a freeway overpass, but not before Ricky bites and takes a chunk of flesh out of Norberto's arm. Norberto then checked Ricky's phone, and discovered he had been in constant contact with his wife, Kara, and to prevent information leaking to the police, Norberto went to the Simmons residence, and shot Kara in the back and departed, but not before his bleeding arm left a drop of blood at the scene. When Kara succumbed to her injuries in hospital, her secret lover, Doakes, was driven to investigate harder and soon discovered the DNA trail and arrested Norberto. LaGuerta offered Norberto a more lenient sentence in exchange for providing enough evidence to bring down Guerrero, and he seriously considered this, but somehow Guerrero knew, and arranged for another one of his assassins, disguised as a prison guard, to bring Norberto to the prison's showers, where he stabs Norberto to death.

Paul Bennett

Rita's abusive and manipulative husband and father of Astor and Cody, who was imprisoned for nearly beating Rita to death. After his release, he tries to rekindle a relationship with his children, though he still harbors disdain for Rita. Paul (correctly) suspects Dexter of framing him for the drug charge that sent him to his latest stint in jail. After a short while in a federal prison, he loses hope after failing to convince Rita of Dexter's plan to frame him. Rita later tells Dexter that he provoked a fight shortly thereafter with another inmate, who beat him to death with a pipe.