A man has been jailed after killing a teenager with friends to see if they were psychopaths.
Enzo Jacomini Carneiro Matos, from Brazil, was sentenced to 15 years in prison after strangling and stabbing 18-year-old Ariane Barbara to death.
The court in Goiania found Carneiro Matos guilty of homicide and concealment of a corpse on March 13.
The investigation found that Matos (who goes by the female name Freya), Jeferson Cavalcante Rodrigues, and Raissa Nunes Borges, had all premeditated the crime.
It was reported that the group planned to kill an innocent person to see how Nunes Borges, who wanted to know if she was a psychopath, would react afterwards.
They decided to kill Ariane Barbara just because of her small thin frame so she would be easier to hold down.
Ariane had left her home on August, 24 2021 to go out for a meal with friends.
But after she failed to return, her mother Eliane Laureano filed a missing persons report with the police the next day.
Her body was found by Civil Police in a woodland area on 31 August and was badly decomposed.
She would later be identified through her fingerprints.
Investigator Marcos Gomes told how the crime was committed in Cavalcante Rodrigues's car as the group played a song about homicide on the stereo.
Halfway through the song, Cavalcante Rodrigues snapped his fingers to give the signal for Ariane to be killed.
Soon after, Carneiro Matos began strangling her and later stabbed her with two knives brought by himself, alongside Nunes Borges.
After the murder, they placed her body in the boot and took it to an area of woodland where it was later found.
Chillingly, the suspects went out for a meal afterwards and carried on with their lives as if nothing had happened until they were arrested.
Officers also arrested a teenage minor following the crime, but they are still investigating her suspected level of involvement.
Matos' lawyer, Cleib Bueno de Morais, has filed an appeal against his client's conviction for homicide.
They argued that he should only have been convicted of concealment of a corpse, for which he received one year in prison.
Bueno de Morais said during the trial: "He became aware of it inside the car. He helped to conceal the corpse. Regarding the homicide, he did not know.
"He was also a victim of all this."
Cavalcante Rodrigues and Nunes Borges will be tried at a later date.
