The delegate Adriano Antonio Soares , the Federal Police in Rio de Janeiro, was killed early on Wednesday in Florianopolis, after exchange of fire in a nightclub in the capital of Santa Catarina. Soares was responsible for opening an investigation into the death of Federal Supreme Court (STF) Minister Teori Zavascki , who died in a January crash.
That ... sounds sufficiently close to what was posted above to be considered "substantively true".