Leandro Acosta, 25, and his stepsister Karen Klein, 22, have admitted to murdering their parents and burning their bodies in Buenos Aires, Argentina.
While Acosta claims he murdered his parents after he endured years of sexual abuse, the prosecution claims he killed them for money, according to Metro.
Monica Chirivin, Acosta's lawyer, relayed Acosta's side of the story to the Daily Mail. According to Acosta, his stepfather, Ricardo Klein, 54, had abused him, his stepsister and their 11-year-old twin siblings for years.
Acosta said he shot his stepfather while he slept in his underwear. When his mother, Miryam Kowalczuk, 52, entered the room to find out what happened, Acosta turned the gun on her.
“She was a whore and a drunkard,” Acosta allegedly said to Chirivin. "I did justice my way."
After both were dead, Acosta allegedly became "sexually excited" and practiced necrophilia on his stepfather’s body. He also impaled his mother’s corpse. The bodies were later dismembered and burned.
Acosta said he cannibalized part of his stepfather’s body, telling Chirivin it tasted “delicious.”
Police have recovered female remains from the home. They also discovered a number of trash bags containing human remains.
Police chief Dario Lutter said three axes, a machete, a shot gun and a 9mm pistol were found at the scene.
Acosta’s defense team alleges he committed the murder while suffering from psychological problems due to the years of abuse.
Acosta “felt relief that the abuse and constant submission was over,” Chirivin said, according to Metro.
“It was all done for their siblings, so that they would not suffer as she did,” she added.
Ricardo allegedly harassed Acosta for not having a job or bringing money into the house, even though Acosta had a disability and was wheelchair-bound, according to the Daily Mail.
Karen claims she only helped Acosta clean up after the murders, but Chirivin said she suspects the step-sister might have also started the fire used to burn the bodies.
Karen and Acosta had reportedly been lovers for six years prior to the murders.
The prosecution disagrees with Acosta and his lawyer’s version of events, arguing that the killings were carried out for financial gain.
“My brother was a tough character, but Leandro always answered back. Money was always the issue,” said Horacio Klein, Ricardo’s brother, Daily Mail reported.
“There has always been resentment between him and his stepson, and I believe this was a long time coming,” added Roberto Klein, another brother.