Criminal justice client rehabs can be considered being a considerably better option than time in jail or heavy fines for those who have been convicted of any sort of drug or alcohol related crime. For instance, somebody who has been found guilty of driving while impaired of drugs or alcohol may be eligible for rehab services for their problem as opposed to serving time in jail. The judge might order that the individual receive treatment, either alone or together with other sentencing. First time offenders in particular tend to be given the opportunity to go with a criminal justice client rehab rather than other sentencing, and it is highly recommended they make the most of it when it is a possibility. The theory behind criminal justice client rehabs is it is far more efficient and effective to invest time and effort into treatment than enforcement of other consequences. Much research has been done to discover how effective this approach 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 do take part in rehabilitation have better chance of remaining out of the system following rehabilitation.