Supervisors are calling for an independent investigation into the escape of 17-year-old Josue Raul Orozco from the Youth Services Center last week.
Orozco -- who police say is a gang member -- remains at large after breaking out from what is considered the state-of-the-art facility near San Mateo.
Investigators say Orozco was able to escape with the help of two other wards by climbing over a 10-foot concrete wall and then making his way through a hole cut in a chain link fence.
His two alleged accomplices were arraigned Tuesday on charges including conspiracy and aiding and abetting in an escape.
