Photo gallery: Alton Sterling shooting

Protesters block traffic and dance on the hood of a car near the Triple S Food Mart where Alton Sterling was shot and killed, July 6, 2016 in Baton Rouge, Louisiana.

Louisiana Gov. John Bel Edwards, surrounded by law enforcement representatives and legislators, addresses the media Wednesday, July 6, 2016, concerning the Alton Sterling shooting by a police officer.

Baton Rouge police chief Carl Dabadie, Jr. center, bows his head in prayer with other officials at the start of a news conference at police headquarters in Baton Rouge, La., on July 6, 2016.

People chant “Black lives matter” outside the Triple S convenience store in Baton Rouge, La., on July 6, 2016.

Gov. John Bel Edwards speaks at a podium with Baton Rouge lawmakers as he announces the U.S. Justice Department’s civil rights division would lead an investigation into the police killing of a black man, Alton Sterling.

Arthur Baines signs “RIP Big Dogg” on a folding table that Alton Sterling used to sell homemade CDs outside a convenience store on July 6, 2016, in Baton Rouge, La.