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Dobin is a police officer who tries to fingerprint Troy only to discover that Troy has no fingerprints.
After a short diatribe from Sergeant James to Troy and Dillon, and a phone call that he revealed came from their commanding officer, Dobin is subsequently instructed to place the Warriors in the holding tank.
After being placed there, the Warriors use their invisibility fields in order to coax Moran to overreact, attracting the attention of Sergeant James. As he opens the door, James calls out for Dobin, who comes in after James is pushed into the cell by Troy and Dillon.
Dobin gets blamed by James for pushing him into the holding tank, leaving him bemused (Galactica Discovers Earth, Part I).