A clinical study of Cambodians who suffered through the Pol Pot regime and the refugee camps near the Thai-Cambodian border, and then migrated to the U.S.A showed that 62% of them were still coping with Post Traumatic Stress Disorder 25 years after their ordeal.
It's reasonable to believe that this figure would hold for Cambodians living in their homeland. And a manifestation of Post Traumatic Stress Disorder is outbreaks of violence. That will most often play out in the home and children subjected to abuse often become violent themselves.
Therefore, despite nearly two-thirds of the population being born after the fall of the Khmer Rouge, Pol Pot and his cohorts continue to plague Cambodia long after their demise.