In 2370, Proka and Rugal visited Deep Space 9 when he was accused by Zolan of mistreating Rugal because he was Cardassian. Commander Sisko ordered that his adopted son be taken and held at the station.
After it was revealed that Rugal's father was still alive, a custody hearing was held to determine where the boy should live. Despite evidence that he genuinely loved the boy as his own son, Proka Migdal lost custody and it was decided that Rugal would return to Cardassia with his biological father, Kotan Pa'Dar. During the course of the hearing, it was discovered that Dukat had deliberately left the boy behind on Bajor and told his father that he was dead, in order to embarrass his rival, Pa'Dar, at a later date. (DS9: "Cardassians")