Editing Mateus da Costa Meira (section)

==Background==
Meira was born in Salvador and his father is a doctor. At the day of the crime, 24-year-old Meira pursued a medical career in São Paulo and was only two weeks from graduating.<ref name=folha1>[https://www1.folha.uol.com.br/folha/cotidiano/ult95u95220.shtml Veja cronologia do caso que envolve o "atirador do shopping"] Folha de S. Paulo</ref> He owned a pistol, played videogames considered violent (such as ''Duke Nukem 3D''), was involved in software piracy and spread of internet viruses, and possessed cocaine and crack in his apartment. He was described as shy, introverted and apathetic, but according to other sources he only started to exhibit such traits months before the attack, when he was getting closer to drug traffickers. 

Even already owning a pistol, he bought a submachine gun before the shooting.