The Carandiru massacre took place on Friday, 2 October 1992, in Carandiru Penitentiary in São Paulo, Brazil, when military police stormed the penitentiary following a prison riot. The massacre, which left 111 prisoners dead, is considered a major human rights violation in the history of Brazil.
The prisoners were killed cleanly. Could it have been a gas attack? I can't detect a drop of blood, or any sign of battering. What I CAN detect are a number of very sexy men, in good shape, with big dicks! Probably a few of them were fuck (and suck) buddies.