Criminal justice client rehabs are available as being a significantly better option than prison time or significant fines for those who have already been convicted of any kind of drug or alcohol related crime. For example, anyone who has been in prison for driving under the influence of drugs or alcohol may qualify to get treatment services for problem rather than serving time in prison. The judge might even order the individual receive rehab, either alone or together with other consequences. First time offenders in particular will often be given the ability to choose a criminal justice client rehab as an alternative to other sentencing, and it is well-advised they take advantage of it when it is an option. The theory behind criminal justice client rehabs is that it is far more effective and efficient to invest effort and time into rehab than enforcement of other consequences. Much research has been done to discover how effective this process is on recidivism rates, i.e. if the criminal justice client returns or not to criminal justice system following treatment. The signs and indicators seem quite positive, and criminal justice clients that do take part in rehab have a better probability of remaining out of the system after rehab.