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 drug or alcohol related crime. For example, someone who has been in prison for driving under the influence of drugs or alcohol may qualify to obtain rehabilitation services because of their problem instead of serving time in prison. The judge could even order the individual receive rehabilitation, either alone or together with other sentencing. First-time offenders in particular will often be given the opportunity go with a criminal justice client rehab instead of other sentencing, and it is well-advised that they take advantage of it when it is a choice. The theory behind criminal justice client rehabs is that it is far more efficient and effective to invest commitment into treatment than punishment. Much research has been carried out to observe how effective this method 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 take part in rehab have better potential for remaining out of the judicial system following rehabilitation.