Quest - Quest - Intercept's Most Wanted #6
Quest Pickup - Cambria (I15) (Carmen)
Quest Location - Meduna City (O1 Map2)
Quest Finish Point - Cambria (I15) (Carmen)
He is in the building to the east in Meduna City, kill him, quest is solved, then return to Carmen for your reward.
TIP: if you have a spare Merc, leave them in cambria while you do these quests so, when you complete it you can instantly get the next quest instead of walking back and forth wasting game time.
BUG: when talking to Carmen to finish the quest and get the reward the only button it allows you to press is the negative talk option, but it still gives the positive outcome.