Two police officers were arrested Tuesday in the killing of Rio city councilor and black gay rights activist Marielle Franco, prosecutors said, almost a year to the day after the brazen murder shocked Brazil. Franco, 38, grew up in a slum and went on to become a charismatic defender of the poor and the LGBT community, and an outspoken critic of police brutality. She was slain in a drive-by shooting along with her driver, Anderson Gomes, in downtown Rio de Janeiro on the evening of March 14, 2018. Her death triggered protests around the world and mass demonstrations in Brazil, but there had been little sign of progress in the murder investigation before Tuesday’s arrests. “