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BRASILIA, BRAZIL - JULY 12: Brazilian leftist presidential pre-candidate Lula Da Silva speaks during a campaign rally at Centro de Convenções Ulysses Guimarães on July 12, 2022 in Brasilia, Brazil. Marcelo Arruda, a municipal guard and Workers Party official, was shot dead on Saturday in Foz do Iguaçu by a federal prison guard (who also died in the shooting) shouting support for right-wing President Jair Bolsonaro. (Photo by Andressa Anholete/Getty Images)

BRASILIA, BRAZIL - JULY 12: Brazilian leftist presidential pre-candidate Lula Da Silva speaks during a campaign rally at Centro de Convenções Ulysses Guimarães on July 12, 2022 in Brasilia, Brazil. Marcelo Arruda, a municipal guard and Workers Party official, was shot dead on Saturday in Foz do Iguaçu by a federal prison guard (who also died in the shooting) shouting support for right-wing President Jair Bolsonaro. (Photo by Andressa Anholete/Getty Images)