Horrifying Story: These Step-Sibling Lovers Murdered Their Parents [PHOTOS]

A step-brother and sister, who claims to be in a relationship with each other, have just confessed to killing their own parents and feeding the remnants of their bodies to their dogs.

In this horrific story, which comes all the way from Argentina, 25-year-old Leandro Acosta and 22-year-old Karen Klein reportedly shot, thus killing, their mother and father for abusing their younger twin siblings.

However, the more gruesome details of the crime only surfaced after Leandro Acosta admitted to eating a part of his stepfather's remains.

According to Unilad, police initially found out about the crime when they discovered a bucket with parts of their mother's pelvic bone at their home in Pilar, Buenos Aires -- which is on the outskirts of the Argentinian capital.

Reports claim that the older step-siblings killed Leandro Acosta's mother, Miryam Kowalczuk, and Karen Klein's father, Ricardo Klein because the parents were abusing their 11-year-old twin brother and sister.

Karen Klein claims that Leandro Acosta shot her father while he was asleep, and then his own mother was shot in the head upon walking through the door, later the same day. The crimes were committed while the twin siblings were off in school.

As if killing your parents weren't enough, the two also dismembered the corpses of their parents. Parts of the bodies that were not fed to the six family dogs were consequently burnt.

Defense lawyer Monica Chirivin says that Leandro Acosta has no sense of remorse for the crimes he committed: "He does not feel remorse and in fact describes a state of relief for a burden he has felt from childhood. [...] He told me that he ate a bit of the corpse. For him it was almost a pleasure."

Acosta claims he was mistreated during his childhood by his mother and stepfather because of a chronic intestinal condition he suffers from, requiring him to use a colostomy bag for his entire life.

Investigations are still underway.

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