The sentencing court may, upon petition, reduce any term of sentence or probation pronounced by the court or a term of conditional release or parole pronounced by the parole board if the court determines that:
(1) The convicted person was:
(a) Convicted of an offense that did not involve violence or the threat of violence; and
(b) Convicted of an offense that involved alcohol or illegal drugs; and
(2) Since the commission of such offense, the convicted person has successfully completed a detoxification and rehabilitation program; and
(3) The convicted person is not:
(a) A prior offender, a persistent offender, a dangerous offender or a persistent misdemeanor offender as defined by section 558.016; or
(b) A persistent sexual offender as defined in section 566.125; or
(c) A prior offender, a persistent offender or a class X offender * as defined in section 558.019.