Criminal justice client rehabs are available being a far better option than prison time or heavy fines for many who have already been convicted of any kind of drug or alcohol related crime. By way of example, anyone who has been in prison for driving under the influence of drugs or alcohol may qualify to receive treatment services because of their problem as an alternative to serving time in jail. The judge may even order that the individual receive rehab, either alone or together with other sentencing. First-time offenders specifically will often be given the ability to pick a criminal justice client rehab as opposed to other sentencing, and it is well-advised they take advantage of it when it is an alternative. The theory behind criminal justice client rehabs is it is way more effective and efficient to invest effort and time into rehab than enforcement of other consequences. Much research has been done to find out how effective this strategy is on recidivism rates, i.e. if the criminal justice client returns or not to criminal justice system following rehab. The signs and indicators seem quite positive, and criminal justice clients who experience rehabilitation have a better potential for remaining out of the system following treatment.