>> in order to conceal his presence, the captors hide hallums in a farm house 16 miles outside of baghdad in a hostile region coalition forces call the triangle of death. >> it's an area that had a lot of issues. there was a large insurgent population. al qaeda had strong base out of that anbar province area. >> roy hallums residence for the next ten months is this underground bunker, seen here in photos, later taken by the fbi's evidence response team. the conditions, inhumane. >> i was always tied up. always had a blindfold. when they shut the door, it would just be totally black. if you tried to stand up, you had to bend over, because it was so short. i was like that 24 hours a day. >> i've been in law enforcement 30 years. i've never heard of such a horrendous environment for someone to be in. >> on close up this morning,