An Argentinian man has been arrested after he confessed to murdering his stepparents and eating his stepfather’s flesh.

Twenty-five-year-old Leandro Acosta told authorities that he and his 22-year-old stepsister Karen Klein have been lovers for six years and that they planned the murders together after allegedly suffering years of sexual and emotional abuse at the hands of their parents. Acosta reportedly shot his stepfather Ricardo Klein, 54, in the head before he became “sexually aroused” and violated his stepfather’s body. When his mother Miriam Kowalczuk walked in and saw what was happening, Acosta shot and killed her.

Read More: cosmopolitan