Pittsburgh Mayor Bill Peduto said he had “serious concerns” over the tactics used in the arrest of a 25-year-old protester on Saturday, after the detention led to a crowd of demonstrators showing up at the mayor’s home on Sunday.
Matthew Cartier, 25, was arrested on Saturday at a Black Lives Matter protest. A video cited by CBS News showed armed officers putting Cartier into an unmarked van; police say he interfered with public safety.
