Yolanda Marodi, who is suspected in the slaying of her wife, a Cal Fire captain, pleaded guilty in 2004 to voluntary manslaughter in the fatal stabbing of her then-husband.

A suspect in the fatal stabbing of a Cal Fire captain in San Diego County was identified Thursday by law enforcement officials, who confirmed she previously served time in state prison for voluntary manslaughter in connection with another killing.

The stabbing of a Cal Fire captain in Ramona is being investigated as a homicide, the San Diego Sheriff's Office said.

Investigators are seeking 53-year-old Yolanda Marodi, also known as Yolanda Olejniczak, in connection with the killing of Cal Fire Capt. Rebecca Marodi, 49.

Rebecca's wife, Yolanda Marodi—also known as Yolanda Olejniczak— was also a veteran firefighter with Cal Fire, having served more than 30 years in the department. Despite her being widely respected by colleagues, Yolanda has been named the primary suspect, according to the San Diego County Sheriff's Office.

Rebecca Marodi was found in her San Diego-area home Monday. A woman has been identified as a suspect in her slaying, but her whereabouts are unknown.

The wife of a Cal Fire captain found stabbed to death in her San Diego County home was identified as a suspect Thursday by law enforcement officials, who confirmed she previously served time in prison in connection with another killing.