A Cardassian legate who visits Deep Space 9 in 2370 to tell Commander Sisko that Central Command holds the abducted Gul Dukat personally responsible for smuggling weapons into the Demilitarised Zone.
Legate Parn is a senior Cardassian officer who appears in the second-season Deep Space Nine episode The Maquis, Part II. He comes to the station while Dukat is a prisoner of the Maquis and makes an unexpected admission: weapons have indeed been reaching Cardassian colonists.
Parn insists that this was the work of a few renegades led by Dukat, and that if the Maquis execute him they will only spare Cardassia the trouble. Sisko and Kira conclude that Central Command is sacrificing Dukat to hide its own policy.
The visit persuades Sisko that Dukat is worth rescuing, and Dukat, once free, helps the station's crew expose the real smuggling route.