Criminal justice client rehabs are available as a far better option than prison time or heavy fines for those who have been convicted of any sort of alcohol or drug related crime. For example, a person who has been in prison for driving while impaired of alcohol or drugs may qualify to get rehabilitation services for problem instead of serving time in prison. The judge could even order that the individual receive treatment, either alone or together with other sentencing. Very first time offenders in particular will often be given the chance to choose a criminal justice client rehab as an alternative to other sentencing, and it is well-advised they take advantage of it when it is an option. The theory behind criminal justice client rehabs is that it is much more efficient and effective to invest time and effort into rehabilitation than enforcement of other consequences. Much research has been carried out to discover how effective this strategy is on recidivism rates, i.e. if the criminal justice client returns or not to criminal justice system following rehabilitation. The signs and indicators appear to be quite positive, and criminal justice clients who do experience rehab have a much better chance of remaining out of the system following rehab.