What if he got a charge on work release, what is he facing?

He is probably not looking at more time, unless what he brought in is either a weapon or a cellphone. The more likely outcome is that he will lose his accrued good time, he will be relegated to the SHU for several weeks or more. He will lose most privileges like phone, visitation and commissary. And finally, he is very likely going to be shipped to a higher security prison to finish out his sentence.