Andrés Ulises Castillo Villarreal

Andrés Castillo was arrested on January 6, 2016 in Vista Cerro Grande colony, as he was in possession of several doses of methamphetamine. He emphasizes the fact that in the last of his crimes he would have been very careless in contrast to the previous murders, where he conducted himself in a methodical way that he left no evidence, believing that he would never be captured. On December 5, 2017, he was sentenced to 120 years imprisonment.

Castillo's first identified victim was Lorenzo Ernesto Olivas Barrios, a 22-year-old man from Delicias, who had moved months before his death to the city of Chihuahua to work in a food company. He lived with relatives in Colonia Vista Hermosa before disappearing on November 13, 2015, saying to a relative that he was going to buy "some dinner", but never returned. Three days later, on November 16, his relatives reported his disappearance; they would not hear any news about him until the following day, when the dismembered remains of a man were found by some neighbors of the Urban Development Company.

On December 13, 2015, more dismembered remains from another man were found, in exactly the same stream, very close to where the first ones were found. The body had only had its legs cut at the knees that were wrapped in a blanket, with the rest of the body also being partially hidden in the trunk, the skull smashed with blows to the head, but there were also two wounds by a .22 caliber firearm. Near the body, the rear half of the same tricycle used in the first case was also found. All the similarities between the two findings, that of Lorenzo Olivas' remains and this new discovery, made it clear that they had been killed by the same person. The victim was identified as Daniel Alfonso Rodríguez Morales, nicknamed "El Troya", 22 years old, who lived in the same Urban Development neighborhood, and had been seen alive for the last time on the same day on the discovery of his remains. Two years earlier, the victim had been arrested for trying to break into a car.

The last confirmed victim was Fernando Valles, who disappeared on the same day that Daniel Rodríguez was murdered and his mutilated body found, Fernando was the brother of a "friend" of Andrés Castillo, Jesús Valles Gandarilla, who was the main caretaker of the latter, who had lost both of his legs in an accident. Jesús would declare that he knew that his brother had visited Castillo before disappearing, but he told him that his brother had left the house and did not know where he went. Jesús believed Castillo, thinking that his brother had simply "abandoned" him. The truth was that Castillo drugged, raped and beat him in the same house where he had killed Daniel Rodríguez. The body on Fernando Valles was found on December 18, 2015, under the floor of Castillo's room, where he had made a pit to place the body and covered it with rocks and cement. The face and entire skull were destroyed.

Andrés Ulises Castillo Villarreal (born 1980) is a Mexican serial killer active in his hometown of Chihuahua City, raping and murdering at least three men and raping a teenager between 2009 and 2015. He confessed to around 12 murders, earning him the nicknames The Chihuahua Ripper and The Urban Development Ripper. He can be classified as an organized, sedentary and hedonistic murderer motivated by sexual compulsion. He was sentenced to 120 years imprisonment in 2017.