Dozens of protesters marched to the Wilmington police station to call for changes in how Delaware police officers are investigated.
Thursday's demonstration comes in the wake of two grand jury decisions in New York City and Ferguson, Missouri declining to indict white police officers in the deaths of unarmed black men.
The protesters in Wilmington say they want to prevent similar outcomes in Delaware.
They say they want prosecutors from outside Delaware's attorney general's office to investigate police officers accused of excessive force. They say that would reduce the potential for conflicts of interest.
The News Journal reports that before cases involving deadly use of force by police can go to a grand jury in Delaware, the attorney general's office must first conclude that charges are warranted.