Atlanta (CNN) -- Robert Samija can't forget the date: April 16, 1993. As fighting raged between Croatians and Muslims in the central Bosnian town of Vitez, he saw the execution of a Muslim police chief -- the father of a classmate. "I saw him get on his knees, begging for his life, and they shot him point blank," he said. "Some people were cheering. But it was horrible." Now, another date will burn bright in Samija's mind: May 26, 2011, the day Serbian army commander Ratko Mladic was arrested after eluding capture for more than 15 years. Mladic, the highest-ranking war crimes suspect who was still at large from the Balkan wars of the 1990s, is wanted on charges including genocide, extermination and murder by the International Criminal Tribunal for the former Yugoslavia.
@highlight
Ratko Mladic's arrest is good news for war victims
@highlight
But for some, it triggers memories of suffering
@highlight
Robert Samija saw the execution of a classmate's father
@highlight
He says Mladic's arrest will help people move forward
One haunting memory typifies the humiliation: A @placeholder soldier made him repeatedly get up on and jump down from a trailer and put a gun to his head.