Failure to Return to Lawful Detention

My question involves criminal law for the state of: Indiana
My question involves criminal law for the state of: Indiana
My roommates boyfriend was in work release in Hamilton County. The other day he was at work and decided he didn’t want to go back. We know he now has a F6 Failure to return to lawful detention over his head but our question is how long could the sentence be??

Failure to Return to Lawful Detention