Replaces everything after the enacting clause. Amends the Unified Code of Corrections. Provides that it is a mitigating factor in sentencing that at the time of the offense, the defendant is or had been the victim of domestic violence and the effects of the domestic violence tended to excuse or justify the defendant's criminal conduct. Defines "domestic violence". Amends the Code of Civil Procedure. Provides that a movant may present a meritorious claim for relief from a final order or judgment if the allegations in the petition establish each of the following by a preponderance of the evidence: (1) the movant was convicted of a forcible felony; (2) the movant's participation in the offense was related to him or her previously having been a victim of domestic violence as perpetrated by an intimate partner; (3) no evidence of domestic violence against the movant was presented at the movant's sentencing hearing; (4)the movant was unaware of the mitigating nature of the evidence of the domestic violence at the time of sentencing and could not have learned of its significance sooner through diligence; and (5) the new evidence of domestic violence against the movant is material and noncumulative to other evidence offered at the sentencing hearing, and is of such a conclusive character that it would likely change the sentence imposed by the original trial court. Defines "domestic violence", "forcible felony", and "intimate partner".