Dozens of protesters marched through Santa Rosa Monday morning on behalf of teenager Andy Lopez.
The eighth grader was killed last October by a sheriff's deputy who mistook his BB gun for an assault rifle.
The activists complain the Sonoma County District Attorney Jill Ravitch still has not released her investigation into what happened, and they question whether her campaign for re-election is a factor.
"It is time for my staff to begin the process of thoroughly reviewing and considering all the facts and circumstances within the context of the guiding legal principles," Ravitch said in a news release.
Last week, Lopez supporters asked State Attorney General Kamala Harris for an independent investigation into Lopez's death.
Bay City News contributed to this report.