What Branch of US Forces or Unit Was Hallam a Member Of?

I just saw The Hunted this week on cable, but also saw it when it was fist released and felt it was a good story, good acting, action, etc. I loved the snowy winter environment and the scene when LT freed that poor white wolf from that horrible snare which must have really hurt and he would have died of starvation probably had LT not saved him.

But I am wondering what type of USA commando Hallam was a member of? All we know is he joined the US Army when the police detective discusses the case with the agents and basically explains that Hallam is listed MIA and cannot be held or prosecuted for any crimes. His presence can't be exposed to the media, no publicity, etc. I doubt he was a Navy SEAL, Delta or Green Beret soldier, but possibly more of a highly trained CIA or similar operator, volunteered or chosen and sent sent out with a small team for highly classified "wet boy" work or a pro "cleaner" to take out foreign villains and enemies of the US.

It was obvious that LT wanted to forget his part in training these elite US commandos and had no intention of reading, answering or contacting anyone of his trainees, especially Hallam. LT probably felt Hallam was his best and most motivated student that could get the job done right and still survive. And actually, what could have LT done or said that could have helped Hallam adjust to a normal life after his military past.

But LT certainly had to know that any of his students could have snapped and lost it and that he couldn't be held responsible for any crimes that Hallam committed. But he also knew he was the only one who had the skills to track him down and bring him in.

All in all, The Hunted was an interesting story, I can compare it to a similar film out a few years ago Shoot To Kill with Tom Beringer and Sidney Poitier, and Kirstie Alley. Also, I see a comparison between Hallam and John Malkovich's role as a CIA "wet boy" assassin "In The Line of Fire." Both characters could not return to society after the work they did as OPS on special missions.

I knew guys in high school that got sent to Viet Nam in 1967-69 as marines, some survived but when they returned, they were not the same. They were struggling just to get through the day, get a job, a family, but some just couldn't fit back into the norm. Whatever they did over in Nam, they didn't want to remember, talk about or relive that part of their lives.

Anyway, The Hunted is done quite well and it shows us a glimpse on what the reality of conflict in the world reflects.