Chicago officials said Sunday they plan to expand a pilot program for police body cameras to one-third of the city by the middle of 2016.

The announcement follows days of protests—including one targeting the city’s famous Magnificent Mile retail district on Black Friday—and calls for further investigations into why it took more than a year for the Cook County prosecutor to charge a white Chicago police officer with murder in the shooting death of a black 17-year-old.

The charges, filed Tuesday, came hours before the release under court order of dash-cam video showing the youth running down the street with a small knife when he was shot 16 times.

City officials said the expanded program would be funded by a $1.1 million federal grant and a similar amount in city funds.

“Expanding this successful program into one-third of the city will help enhance transparency and credibility as well as strengthen the fabric of trust that is vital between police and the community,” Chicago Mayor Rahm Emanuel said in a statement.