Authorities asked for help Monday to find an ex-con suspected of killing her wife, a veteran state firefighter, at the victim’s Ramona home — more than 20 years after pleading guilty in the slaying of her estranged husband.

Authorities asked for public help in their quest to find Yolanda Marodi, suspected of fatally stabbing wife Rebecca Marodi in her Ramona home.

New details have emerged as the San Diego County Superior Court has issued an arrest warrant for Yolanda Marodi, the wife of Cal Fire Captain Rebecca Marodi, who was killed at her home on Feb. 17. According to the arrest warrant, approximately one week before the incident, Rebecca told Yolanda that she was leaving her and ending their marriage.