CO-Labor law apply to correctional officer?

My husband works for the department of corrections (DOC) in Colorado. He recently worked 48 hours straight when there was an escape at the Sterling facility. First, the DOC does not pay overtime, they pay comp time, paid time off, (which I think is illegal in itself). My husband should have accrued 60 hours of comp time from that 48 hour shift (time and 1/2 for every hour over 8 hours) but they are now claiming that since he was not at his prison (Limon) during that time, it counts as time off and they are taking those 2 days (16 hrs) out of his comp time even though he was working for the state at the time. Second, they are also claiming that the 3 hours of "sleep" he was allowed on a cot in the prison count as a break and won't pay him for it. He was not allowed to leave the Sterling facility during those 3 hours and had to eat prison food, so it couldn't even count as a lunch. I don't see how they get away with any of this. Is this legal? Is there some kind of loophole in labor law for correctional facility staff?

[AFFA]

I wish to inform you that your husband may claim amount of overtime from the Department of Corrections. In this regard, the Department of Corrections is the employer and therefore will be required to pay wages as per law. Your husband's work hours will include all the hours he is at employer performing duty as told by his employer. If employer allows break then it will be included.

AFF