[Goodgirlinred]

Why can't they get rehab while they are in jail so they won't do drugs again? Don't their parole officers check them for drugs when they get out?

[Enterprise]

Some people can get rehab while in jail, others can't. The question you posed covers all jails and jurisdictions. And there is a substantial difference between jail and prison. There is no "one size fits all" answer that can adequately address it.

Parole officers do check for the presence of illegal controlled substances in parolees, but if a parolee wants to use, he will. If he wants to quit, he will.