No, it is not "dead time". Your husband should be given credit for every day in jail. In fact, if I'm understanding you correctly, it seems unlikely he'd ever go to the Department of Corrections (DOC). DOC is for people sentenced to MORE than a year of incarceration. If the sentence is a year or less, it is typically at the county jail. This is not an absolute rule though. For example, if he was sentenced to 18 months (the time of the probation) minus the time already completed, this could be looked at as an 18 month sentence, regardless of the time already served on probation. The result then is an 18 month sentence, meaning DOC.
If I'm reading your statement correctly, the remaining time was 42 days and he was sentenced in April, a little over a month ago. If these two things are true, he should be getting released any day now. I would suggest calling the jail in which he is being housed and check on his release date.
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