This is the 18th time that Buffalo Bill escaped. No more exceptions, lock him away for good. 

The Prisoner Transport Mission can be started from a Police Transporter as a Law Enforcement Agent. These can be found at some Police Stations. To start the Prisoner Transport mission, get into a Police Transporter and type /mission. You will receive instructions to pickup 2 prisoners at Police Stations across the map. The locations will appear on the mini-map as flashing Light Blue Cuffs

Follow the light blue line on your minimap to the location of the Police Station. When you arrive at the location, officers will accompany a prisoner who is awaiting transport to Bolingbroke Penitentiary. Enter the blue checkpoint and wait for the prisoner to enter your vehicle. 

Once you pickup both prisoners, turn on your lights and sirens and follow the Orange line to deliver the prisoners to Bolingbroke Penitentiary. When you arrive at Bolingbroke Penitentiary, stop the vehicle in the checkpoint and let the prisoners out. You will receive a reward when you complete the mission. 

Type /cancel to cancel the mission.