Rev. Jesse Jackson (C) joins demonstrators during a protest intending to disrupt Black Friday shopping in reaction to the fatal shooting of Laquan McDonald in Chicago, Illinois, November 27, 2015. REUTERS/Andrew Nelles

Three current or former Chicago police officers have been indicted on multiple charges for allegedly conspiring to cover up wrongdoing by Officer Jason Van Dyke, who gunned down 17-year-old Laquan McDonald in October 2014.

Detective David March and patrol officers Joseph Walsh and Thomas Gaffney were each charged with conspiracy, official misconduct and obstruction of justice in the case, the Chicago Tribune reports.

“The indictment makes clear that these defendants did more than merely obey an unofficial ‘code of silence,’ rather it alleges that they lied about what occurred to prevent independent criminal investigators from learning the truth,” Patricia Brown Holmes, who was appointed special prosecutor, said in a statement, according to the Tribune.