McCallan (Day 4)

Agent McCallan was a CTU field agent during Day 4. He was part of the SWAT team sent to apprehend Mandy and Gary at The Mercerwood. He met Jack outside of Mandy and Gary's unit and picked the lock. He and Jack secured the apartment and found Gary's dead body. He photographed Gary and sent a photo back to CTU so that Richard Heller could confirm his identify.