He transported illegal immigrants from Cuba to Miami. As part of the scheme, he would raise the price after they arrived in Miami. They were held captive until Castillo was paid. If they or their families didn't have the money, the immigrants were killed.
Dexter Morgan aware of Castillo's operation after Rita told him that her co-worker began to worry when her fiance never arrived in Miami after leaving Cuba. Rita asked Dexter if he knew anyone who could help find out what happened. After Dexter checked with the immigration department, he looked into Castillo himself. Dexter found him at his salvage yard and introduced himself as "Dave Cutler." Castillo pretended to not understand Spanish and claimed to be American when Dexter tested him during their first encounter. Castillo lived a life of luxury from the money he extorted from desperate Cuban families. While stalking Castillo, Dexter noticed his attractive wife, high-priced home, and expensive sports car.The immigrants that Castillo recently brought over were being held captive inside a filthy metal storage unit in his salvage yard while he waited for their families to pay ransom. If a family never paid, the person was taken out on Jorge's boat, drowned, and tossed overboard. The police assumed the drowning happened while the person was trying to get into the country illegally and did not investigate any further.
One night when Castillo returned to his salvage yard, he found a trail of lit candles leading to a trailer. He followed them inside, only to be ambushed by Dexter. Shortly thereafter, his wife Valerie arrived to the yard and, much to Dexter's surprise, she was fully aware of her husband's illegal schemes. Dexter hastily captured her as well and prepared a kill room for both of them.
Just before Dexter moved to kill the Castillos, Jorge and Valerie professed their love for one another, causing Dexter to hesitate. When Dexter asked them how they made their relationship work since they're killers, they replied that they wanted the same things and had the same dream. After that, Dexter stuffed cotton in their mouths to stop them from talking and killed them. Because he was short on time, Dexter simply sliced Valerie's carotid arteries and didn't dismember her. Dexter later had to frame Jorge for Valerie's murder when the Ice truck killer, who had been stalking Dexter, dove after her body and placed it back in the trailer. To do this, Dexter used the blood from Valerie's blood slide, and placed a knife at the crime scene.
- Unnamed boy
- Unnamed woman
- Unnamed grandmother
- Ernesto Rodriguez (age 31)