A Bajoran traveller in the episode Cardassians who tells Julian Bashir that the Cardassian war orphan Rugal is mistreated by his adoptive Bajoran father, a claim that proves to be false.
Zolan is a Bajoran who arrives on Deep Space 9 in the company of Proka Migdal and his adopted Cardassian son Rugal in the second-season episode Cardassians. After the boy bites Garak on the Promenade, Zolan comes forward and tells Julian Bashir that Rugal has been abused and taught to hate his own kind.
That statement gives Starfleet grounds to take Rugal from Proka while the matter is looked into, and the boy is lodged with the O'Briens. It also suits Gul Dukat, who is quick to make a public cause of the abandoned Cardassian orphans.
The accusation is not borne out, for Rugal is plainly loved by the couple who raised him. The inquiry by Bashir and Garak shows the whole affair was arranged by Dukat to disgrace his rival Kotan Pa'Dar, the boy's real father.