In this Friday, March 10, 2017, photo, Oakland police detectives and FBI agents work together in the offices of the Oakland Safe Streets Task Force in Oakland, Calif. Standing at left is Oakland homicide detective Jason Turner. The federal government already plays a big role in fighting violent crime in cities, through grants and partnerships. Ten FBI agents now share an office with Oakland detectives, offering help gathering evidence, collecting DNA, chasing leads and bringing federal prosecutions that carry longer sentences in far-away prisons. (AP Photo/Eric Risberg)