Police officer Kyle Wren wears a body worn camera outside of the Ingleside police station in San Francisco, Calif. on Sept. 1, 2016. Wren was one of the first officers from the Bayview station to field test the cameras before they were issued department-w

Police officer Kyle Wren wears a body worn camera outside of the Ingleside police station in San Francisco, Calif. on Sept. 1, 2016. Wren was one of the first officers from the Bayview station to field test the cameras before they were issued department-wide. Officers assigned to the Ingleside are the second in line to be outfitted and trained with the cameras. (Photo By Paul Chinn/The San Francisco Chronicle via Getty Images)