Three existing or previous Chicago cops policemanslaw enforcement agent were arraigned on state felony fees for purportedly engagingparticipating in a conspiracy theory in an attempt to preventto avoid or shape an independent criminal examination of the police-involved shooting death of 17-year-old Laquan McDonald.The charges were announced Tuesday by Patricia Brown Holmes, a Special Prosecutor appointed by Presiding Judge LeRoy K. Martin Jr. of the Circuit Court of Chef County Bad guy Division.