A Wisconsin prosecutor says he's ready to announce whether to charge a white police officer who fatally shot an unarmed biracial man.

Dane County District Attorney Ismael Ozanne says he'll announce on Tuesday whether Madison Officer Matt Kenny will face charges in the death of 19-year-old Tony Robinsion.

Police have said Kenny was responding to reports that Robinson had assaulted two people and was running in traffic. They say Robinson attacked Kenny, but details haven't been released.

The shooting has sparked multiple street protests led by a group called the Young, Gifted and Black Coalition, with demonstrators demanding Kenny be charged with homicide.