Magdalena Solís

One night in May 1963, a 14-year-old local, Sebastián Guerrero, was wandering around the caves where the sect was performing their rites. Drawn by the lights and noises coming from one of the caves, he went to investigate; to his horror, he watched as the cult was in the process of killing yet another victim. Terrified, he ran for more than 25 kilometers to the town of Villa Gran, where the nearest police station was located. Exhausted and in a state of shock, Guerrero failed to give any other description than seeing a "group of murderers, seized by ecstasy, gathered to drink human blood".

Dismayed by the disappearance of both Guerrero and their colleague, the police started to take the case seriously, and contacted the army for assistance. On May 31, 1963, both police officers and soldiers conducted a joint crackdown in Yerba Buena, arresting Magdalena and Eleazar Solís at a farm in the town, where they were under the influence of marijuana. Santos Hernández would later be killed while resisting arrest, while his brother, Cayetano, had already been killed by a delusional cult member, Jesús Rubio, who later claimed that he had wanted to take a part of the high priest's body to protect himself. Many of the cult members, who had barricaded themselves inside the cave, were killed in shootouts as well.

In late 1962 or early 1963, brothers and petty scammers Santos and Cayetano Hernández, devised a ploy to help them acquire wealth fast. They travelled to the isolated community of Yerba Buena, an impoverished and mostly illiterate village of about 50 inhabitants, to whom they proclaimed themselves as prophets and high priests of "the powerful and exiled Inca gods". They proclaimed that "the Inca gods, in exchange for worship and tributes, would grant them hidden treasures in the caves of the mountains surrounding the town (a place where they also performed their rites); and that they would soon come to claim authority over their ancient kingdom, and punish the non-believers."

Magdalena Solís (1947 – date of death unknown), known as The High Priestess of Blood, was a Mexican serial killer and cult leader responsible for orchestrating several murders which involved the drinking of the victims' blood. The murders were committed in Yerba Buena, San Luis Potosí, during the early 1960s.

Magdalena Solís came from a poor and most likely dysfunctional, family in Tamaulipas, where she was supposedly born in 1947. She is believed to have been working as a prostitute since an early age under her brother, a local pimp named Eleazar, before joining the Hernández Brothers' sect in 1963. After this, Solís developed a serious theological psychosis, causing her to experience major religiously-oriented delusions of grandeur, coupled with a myriad of sexual perversions expressed in consuming the blood of her victims, sadomasochistic tendencies, fetishistic practices and pedophilia.