Officer Michael Rosfeld was charged Wednesday in the fatal shooting of the 17-year-old teen.
William Ronald Pulliam, 62, allegedly shot 15-year-old James Harvey Means after the two bumped each other on the street.
The shooting previously sparked protests in Aurora, given its profile as a Black Lives Matter story and the way that the investigation had been botched.
Pryor had won Mario Tricoci's "Mario, Make Me a Model" contest just over a month before her untimely death.
County prosecutors have said that a grand jury will decide if the charges will be filed.
