That kind of rehab would actually ehem, work. Hard labor in prison is what he needs. Hell is what he will get in the end. His mommy didhim no favors.
Hell is what any of us will get, if we don't repent of our sins and place our trust in our Lord and Savior Jesus Christ. May our Heavenly Father grant him, and his parents, the grace to do that.
As for the rehab ... After 10 years at least he'd know how to swing a hammer. It's a useful skill.