On the morning of 7 April 2011, a school shooting occurred at the Tasso da Silveira Municipal School, an elementary school in Realengo, a western neighbourhood of Rio de Janeiro, Brazil. Twelve students were killed, and 22 others seriously wounded by 23-year-old Wellington Menezes de Oliveira, a former student who committed the attack with two revolvers. Oliveira was intercepted by the police but committed suicide before being arrested. It was the first reported mass shooting at a school to not be tied to gang violence in Brazil. It remains tied along with the 2016 Campinas massacre as the second-deadliest mass shooting by a lone gunman in Brazilian history, both surpassed only by the 1997 Santo Antônio do Potengi massacre.
Although police found no concrete evidence of religious or political motives, texts found at Oliveira's home suggest that he was obsessed with terrorist acts and Islam, which he had converted to two years beforehand, after having been a Jehovah's Witness. He had requested to be buried following Islamic traditions and asked Jesus for eternal life and "God's forgiveness for what I have done." According to his adoptive sister and a close colleague, Oliveira was a reserved person, and had previously suffered from bullying.
Police investigations prior to the massacre, via an anonymous report, found that Oliveira had purchased a .32-caliber revolver with two men—Charleston Souza de Lucena and Izaías de Souza. Both suspects confessed to have being middlemen in the revolver's sale at a nearby kiosk in Sepetiba. According to one of the suspects, Oliveira claimed that he had bought the weapon to protect himself. According to Lucena and Souza, the person who sold them the firearm was called Robson. The men also claim that Robson had been missing since the sale and presumed dead.
Both Lucena and Souza stated they regretted the sale. Lucena said: "If I had known he was going to do that, I would never have sold the gun. I have children. He [Oliveira] lived across the street from the school where my six-year-old daughter and stepson studied."
A 57-year-old slaughterhouse worker and former co-worker of the perpetrator was eventually discovered to be the one to sell Oliveira the second weapon used in the attack. According to him, he sold Wellington the weapon, the speedloaders, and a large quantity of ammunition, possibly including that used in the shooting.
At around 08:30 (BRT) on Thursday, 7 April 2011, Oliveira entered the Tasso da Silveira Municipal School. After entering, he claimed that he was a lecturer who was scheduled to host a talk to the students that morning. After being allowed entry, Oliveira proceeded to the first floor and entered an eighth-grade classroom, where a Portuguese class was taking place. Immediately after entering, he took out his weapons and fired at several students. He was armed with two revolvers, one in each hand, and a number of speedloaders that, according to the police, required expert training to use efficiently. Oliveira specifically targeted girls to kill, only shooting boys in the arms and legs in order to incapacitate them. According to witnesses, he referred to the girls as 'impure beings' during the shooting, and shot many of them in the head at point-blank range. Ten girls and two boys, aged between 13 and 15, were killed in the classroom, with Oliveira firing more than thirty shots.
Many children and staff members evacuated the school after hearing the initial gunfire. One student alerted two Ministry of Transport officers who were patrolling the nearby area to the shooting. A Rio de Janeiro military policeman, Third Sergeant Márcio Alexandre Alves, entered the school after being made aware of the situation, and encountered the gunman on a staircase. Alves shot him in the leg and in the stomach, causing the gunman to fall down the stairs. Oliveira then committed suicide with a gunshot to the head. According to Alves, Oliveira pointed one of his revolvers at him, but did not shoot, instead deciding to turn it on himself. He later stated, "The feeling is of sadness for the children. I have a kid that age. But also there's a feeling of accomplishment, I stopped him from going to the third floor and killing more victims."
11 of the 12 students were buried the day after the shooting following the Brazilian practice of burying (or cremating) people within a day of their death. The twelfth child's body was cremated two days after the shooting.
Wellington Menezes de Oliveira (13 July 1987 – 7 April 2011), a 23-year-old former pupil of the school, was identified as the perpetrator. He was adopted by Dicéa Menezes de Oliveira as a child; his biological mother suffered from a mental illness and had attempted suicide in the past. He was described as a quiet, shy and introverted boy, who stayed out of trouble and followed rules. Dicéa Oliveira was a Jehovah's Witness and died in 2010, a year before the shooting. Wellington also claimed to be a follower of the Jehovah's Witnesses religion earlier in life, but reportedly rarely adhered to its teachings.
Oliveira attended the Tasso da Silveira Municipal School from 1999 to 2002. According to former schoolmates he was a strange, very reserved person constantly harassed by others, was called "Sherman" (an allusion to a character from American Pie), as well as "suingue" (swing), because he had a limp leg, and was once thrown into a garbage bin. In a video he had recorded two days prior to the shooting Oliveira stated: "The struggle for which many brothers died in the past, and for which I will die, is not solely because of what is known as "bullying" [the English word]. Our fight is against cruel people, cowards, who take advantage of the kindness, the weakness of people unable to defend themselves.
Oliveira, in a letter, refers to the bullying he suffered at school: "A lot of times I was beaten by a group, and everyone who was around mocked me, had fun with the humiliation I suffered with, without caring about my feelings". According to the statement of an ex-schoolmate: "Once upon a time in school they put Wellington with his head down, placed his head on the toilet and flushed it. Some people instigated the girls: 'Come on, mess with him'. Or they would be the one incentivizing: 'Let's play with him, let's screw with him'. The abuse happened in 2001. In that year, on September 11, the biggest terrorist attack of all time became an obsession to Wellington".
In an April 13 interview with his adoptive family, it was stated Oliveira had only a handful of friends that he saw in person, with most of the people he talked to being via the internet. Oliveira spent almost all of his time on his personal computer. His mother apparently treated him differently later in life, possibly due to his refusal to move out and start a family, in contrast to his siblings who were all married. His mother also anticipated that she would die before her son moved out, which she did.
Her death in 2010 apparently caused Oliveira's already poor mental health to worsen. In 2010 he stopped attending sessions with a psychologist, possibly due to the death of his mother. And her death worsened his mental illness, already known by his family and with an attempt of treatment with a psychologist, that was abandoned by the young man. He previously attended Jehovah's Witnesses meetings with his mother, but stopped after her death, with this being the time he stopped associating with the religion all together, beginning to search for other religions.
After the death of Dicéa, his brothers searched his computer and found that he made internet searched related to firearms. In addition, he also took shooting classes. It is speculated that, due to this, Oliveira began planning the attack around this time, picking his former school as the target as revenge for the bullying he faced.
Pictures taken by Oliveira show him standing in positions similar to that of Seung-Hui Cho, perpetrator of the Virginia Tech shooting, including him pointing the firearms used in the shooting at himself and the camera. It was later confirmed he felt "inspired" by Cho, going so far as to call him a "brother" and thanking him, along with fellow Brazilian Edmar Freitas, the perpetrator of the 2003 Taiúva school shooting, for their "bravery" and for "leading the way".