A 13-year-old student walked into the Instituto São José in Rio Branco, the Amazonian capital of Acre state, on Tuesday afternoon and opened fire with a 9mm pistol belonging to his stepfather, killing two female supervisors and wounding a third employee and an 11-year-old student. The assailant fired in a corridor leading to the principal’s office, did not enter any classrooms, and then surrendered to the military police. Panicked students tried to scale a six-metre wall into a neighbouring hotel; only one succeeded, leaving many trapped on the school roof until officers arrived. The boy has been taken into custody, and the government of Acre declared a three-day suspension of classes across the state, mobilising psychological support teams for pupils and teachers alike.

From Brasília, the Ministry of Education ordered a specialist crisis team from the Escola que Protege programme to fly to Acre, a response that reflects the federal government’s growing alarm over a spate of school attacks in Brazil in recent years. In Rio Branco, the governor, Mailza Assis, declared that the teenager “did not act alone”. Investigations by the Batalhão de Operações Especiais have revealed that other students were aware of the plan through a social media group, and the police are now examining whether they provided any cooperation. The stepfather, identified as Juan de Mesquita Amorim, a lawyer who held a state government commission, was briefly detained after the attack, questioned, and released after signing a Termo Circunstanciado de Ocorrência; the same day, the state government exonerated him from his post. He denies any involvement, and his defence says he is cooperating.

Viewed from Washington, the attack echoes a pattern that has troubled American society for decades, but analysts in London note that Brazil’s epidemic of school violence has accelerated only in the past five years, often involving minors who access firearms kept carelessly at home. The use of a stolen stepfather’s weapon, the premeditation shared on social media, and the fact that the shooter turned himself in all suggest a copycat dynamic influenced by online subcultures. The federal response — deploying psychological teams and suspending classes — is standard protocol, but critics argue that the measures do not address the root causes: easy firearm availability, inadequate school security, and the radicalisation of young boys in digital spaces.

The coming days will test whether Acre’s authorities can extract a full account of the plot from the detained teenager and his peers, and whether the episode prompts the national Congress to tighten Brazil’s already fractious gun-control laws. For now, the Instituto São José remains a crime scene, its corridors empty, its survivors in shock. The state has promised a thorough investigation, but across the country, teachers and parents are left asking the same weary question: how many more schoolyards will be soaked in blood before the cycle is broken?