CA AB593

Makes provisions for habeas corpus writs based on intimate partner battering testimony operative indefinitely, removing the previous January 1, 2020 expiration date.

Allows habeas corpus petitions when competent and substantial expert testimony relating to intimate partner battering and its effects was not presented at trial, if there is a reasonable probability the result would have been different.

Applies only to violent felonies committed before August 29, 1996, where the conviction or sentence resulted from a plea or trial.

Clarifies that presenting non-competent or non-substantial battering testimony at trial does not bar a habeas corpus petition, with the burden of proof on the petitioner.

Denies new petitions if a prior court already determined on the merits that omission of such expert testimony was not prejudicial.