Criminal justice client rehabs are available as a considerably better option than prison time or heavy fines for many who have 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 be eligible to obtain treatment services because of their problem instead of serving time in prison. The judge might order the individual receive treatment, either alone or together with other consequences. First-time offenders specifically will often be given the opportunity to select a criminal justice client rehab as opposed to other sentencing, and it is well-advised they take advantage of it if it is a possibility. The theory behind criminal justice client rehabs is that it is way more efficient and effective to invest effort and time into rehabilitation than punishment. Much research has been carried out 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 rehabilitation. The signs and indicators appear to be quite positive, and criminal justice clients that experience rehab have a much better probability of remaining out of the system following treatment.