Andrés Ulises Castillo Villarreal

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.[1][10][11] 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.[12] 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.[10][11][12]

The arms and legs were found inside an abandoned house on Novena and San Abel Streets. Two days later the torso and head were found on a street next to the house, on the streets Once y Álamos, partially hidden inside a tree trunk at the bottom of a dry stream, and above the remains a front half of a tricycle was found.[1][10][11][12] DNA tests confirmed the victim's identity. According to subsequent inquiries, it was determined that on the night of November 13, Olivas would have gone to a bar called "California" on Nueva España Street and R. Alameda, where he met with Castillo.[10] He accompanied him to his home on Ninth Street in the same neighborhood, where after consuming methamphetamines, Castillo assaulted, raped and murdered him, hitting his head with a hammer until the skull was destroyed.[12][13] After dismembering the body in the bathroom, he then coerced with threats of killing a teenager to help him transport the remains. Both then returned to his home on Ninth Street, where they cleaned and painted the walls stained with blood. Castillo later raped the young man.[12]

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.[1][12][14][15] 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.[14][15][16] Two years earlier, the victim had been arrested for trying to break into a car.[17]

According to the reconstruction of the events after the murder of Lorenzo Olivas, the murderer moved with deceit to the house of a friend located on Álamos Street in the Urban Development neighborhood, continuing to harass the teenager whom he forced to help him and made him move into his house on December 13. Castillo then invited his new victim to a friend's house, drugging him in front of the host and the teenager, and proceeding to hit him on the head with a rock to kill him. He forced the two witnesses under the threat of death to help him get rid of the body.[12]

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.[18] The truth was that Castillo drugged, raped and beat him in the same house where he had killed Daniel Rodríguez.[18] 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.[19]