I saw this for the first time on a flight back in September, FAI-SCC-BRW. One guard and one prisoner in a black jumpsuit. Boarded first, took the last row, prisoner in the window, guard in the aisle. They stayed onboard during the stop in Prudhoe Bay. In Barrow, they exited first and walked to a waiting SUV/transport on the tarmac.

Just about the only thing worse than the last row in coach is prison at the top of the world!