On May 1, people in Baltimore poured into the streets in celebration after State’s Attorney Marilyn Mosby announced that the six cops involved in the death of Freddie Gray would all face criminal charges, including second-degree murder against one of them. The filed charges were proof of the power of protest in Baltimore and the impact of the Black Lives Matter movement.

Last year, the refusal of grand juries in Ferguson, Missouri and New York City to bring charges against officers for the murders of Mike Brown and Eric Garner sparked the movement’s biggest marches and actions yet. Just last month, in Chicago, protesters angrily demonstrated against the acquittal of Dante Servin, who was on trial for killing twenty-two-year-old Rekia Boyd in 2012.

Though an indictment is a long way from a conviction, the charges in Baltimore showed people weary of seeing police go free — no matter how awful and well-documented their violence — that protest can have an impact.