Criminal justice client rehabs are available as being a significantly better option than jail time or heavy fines for those who have already been convicted of any sort of drug or alcohol related crime. For example, a person who has been in prison for driving under the influence of drugs or alcohol may qualify to receive rehabilitation services for their problem instead of serving time in jail. The judge might order that the individual receive rehab, either alone or in addition to other sentencing. Very first time offenders specifically in many cases are given the ability to select a criminal justice client rehab instead of other sentencing, and it is highly recommended they benefit from it if it is a possibility. The theory behind criminal justice client rehabs is that it is much more efficient and effective to invest commitment into rehab than enforcement of other consequences. Much research has been done to find out how effective this process is on recidivism rates, i.e. if the criminal justice client returns or not to criminal justice system following treatment. The signs and indicators appear to be quite positive, and criminal justice clients who experience rehabilitation have a much better chance of remaining out of the system after treatment.