A special prosecutor was appointed Friday for the investigation into the officers who were at the scene of the Laquan McDonald shooting. 

Cook County Chief Criminal Court Judge LeRoy Martin Jr. appointed former judge and federal prosecutor Patricia Brown Holmes as the special prosecutor.

Chicago police officer Jason Van Dyke was charged last November with first-degree murder in the October 2014 shooting death of 17-year-old McDonald. No other officers have been charged in the case. 

A group of civil rights lawyers requested that a special prosecutor be appointed for the Van Dyke case as well as an investigation into whether his fellow officers tried to engage in a cover-up.

Cook County State's Attorney Anita Alvarez recused herself from the Van Dyke case in May, and a special prosecutor is expected to be appointed soon.