Inscription: The Victim's Grave. The 14 victim's corpses have been found by the army forces of the Front Union of Salvage National Kampuchea, through the building "A" and carried its to bury in this place. Among of those corpses, there was a woman victim. these victims were the last ones who had been killed by the agent of S.21 before their fugitive.
In 1975 the Khmer Rouge turned Tuol Svay Prey High School into a prison and interrogation center known as Security Prison 21. It became the largest detention center in the country, and out of almost 20,000 prisoners detained there only seven survived. When the Vietnamese liberated Phnom Penh in 1979, they turned the prison into a genocide museum.