A high school teacher has been detained in Kenya, after a self-confessed serial killer said that she told him to kill 100 people for good fortune. Philip Onyancha, 32, has confessed to killing 17 people, mostly women, and says he did so because teacher Elizabeth Wambui inducted him into her blood-drinking cult when he was in school in 1996, the Kenyan Broadcasting Corporation reports. “My target was to kill 100 women,” Onyancha said. “I managed 17 and there were 83 to go.” He said he targeted women and young children because they were weak. Police nabbed Onyancha last Thursday when he called the father of one of his victims to extort money from him. Since then, he’s been remarkably helpful, leading them to various murder sites around the country. He’s neatly resolved so many unsolved murders that some Kenyans suspect he’s lying, a BBC correspondent reports.