Criminal justice client rehabs can be considered as a considerably better option than incarceration or significant fines for individuals who have already been convicted of any type of drug or alcohol related crime. As an example, someone who has been in prison for driving while impaired of alcohol or drugs may be eligible to obtain rehab services because of their problem as an alternative to serving time in jail. The judge might order the individual receive rehabilitation, either alone or in addition to other consequences. Very first time offenders specifically will often be given the opportunity to select a criminal justice client rehab instead of 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 that it is much more effective and efficient to invest time and effort into treatment than enforcement of other consequences. Much research has been carried out to observe how effective this approach is on recidivism rates, i.e. if the individual returns or not to criminal justice system following rehabilitation. The signs and indicators appear to be quite positive, and criminal justice clients that take part in rehab have better chance of remaining out of the system after rehabilitation.