A teenage girl who wanted to know if she had what it takes to be a psychopathic killer allegedly murdered another teen girl in order to test the sordid theory.
The unsuspecting victim, Ariane Barbara Laureano de Oliveira, 18, had been chosen because she was small and petite, and unlikely to put up much of a fight.
Raissa Nunes Borges, 19, was the girl who wanted to know if she could become a psychopath and had come up with the twisted plan together with two other friends, Jeferson Cavalcante Rodrigues, 22, and Enzo Jacomini Carneiro Matos, 18.
Police are convinced the trio worked together carefully to plan the killing in advance.
The three even drew up a list of potential suspects before eventually settling on Ariane, who they arranged to meet so the killing could be carried out by Borges.
The family of Ariane confirm that she vanished after she left home to meet up with the three in the Brazilian city of Goiania on Tuesday, August 24. On the night of the murder Ariane even sent her mother an audio message saying she was with friends, but would be coming home soon. Her mother never saw her alive again.
Her body was found seven days later after locals alerted police to a bad smell coming from the area. The body was found in nearby woods with three stab wounds and signs of strangulation.
Police allege the suspects' plan was for Borges to kill the teenager to test if she really did have psychopathic tendencies or not, but when it came down to it the victim put up too much of a struggle, so the others had to join in.
Murder plot triggered by pre-planned song
The three had attacked Ariane after she got into the car in a carefully rehearsed scenario prepared beforehand.
It was arranged that the killing would only take place when they started playing a specific song. The song dealt with the subject of murder, and the arrangement was that when one of the other two clicked their fingers, Raisa would kill the teen.
According to a detailed description of what happened published in local media, at that moment Raisa had attempted to strangle Ariane but failed, and subsequently had to get assistance from one of the others.
The victim then passed out but because she was still breathing they decided to stab her three times to make sure she was dead.
It is not clear which suspects did the stabbing or in what order.
Once they were satisfied that the 18-year-old was dead, they hid her body in the woods and drove off.
The police have since examined the car and found that the bin bags used to hide the body were already in the boot when the murder was carried out.
The local police chief told G1: "We identified the driver of the car and after arresting them they confessed to the crime, and presented us with a blood-stained knife believed to have been used in the crime."
The investigation is ongoing.
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