Criminal justice client rehabs are available as a considerably better option than prison time or heavy fines for many who have already been convicted of any kind of drug or alcohol related crime. For instance, a person who has been in prison for driving under the influence of alcohol or drugs may be eligible for rehabilitation services for his or her problem instead of serving time in prison. The judge could even order the individual receive rehab, either alone or along with other sentencing. First time offenders specifically in many cases are given the opportunity go with a criminal justice client rehab as opposed to other sentencing, and it is well-advised that they reap the benefits of it if it is an option. The theory behind criminal justice client rehabs is that it is much more effective and efficient to invest time and energy into treatment than enforcement of other consequences. Much research has been carried out to see how effective this process is on recidivism rates, i.e. if the criminal justice client returns or not to criminal justice system following rehabilitation. All indicators appear to be quite positive, and criminal justice clients who experience rehab have a better chance of remaining out of the system after treatment.