The special prosecutor appointed to look into the shooting of Chicago teen Laquan McDonald wants a grand jury empaneled to hear evidence in the case.

Cook County Judge Patricia Brown Holmes was named in July as the special prosecutor to look into whether Chicago Police officers covered up the circumstances that led to the fatal shooting of 17-year-old McDonald.

Kane County State’s Attorney Joseph McMahon in August was appointed special prosecutor on the murder case against Officer Jason Van Dyke, who is accused of shooting McDonald.