The Los Angeles County Board of Supervisors on Tuesday demanded an independent investigation into the shooting death of 18-year-old Andres Guardado by the LA County Sheriff's Department.

The motion, put forth by Supervisor Mark Ridley-Thomas, mandates that the Inspector General be provided with all evidence throughout the investigation as it is collected in the case.

"Our principal concern is that the people of this county have a degree of confidence that we have attempted to make sure that there is accountability, transparency, that there is nothing being concealed," Ridley-Thomas said.