Athina Sumi Rivera stabbed her mother to death.
Athina Sumi Rivera pleaded guilty of stabbing her mother to death. Photo via Covina Police Department.

A Los Angeles killer pleaded guilty Thursday to stabbing her 61-year-old mother to death as she slept in the middle of the night at a senior living facility in Covina.

Athina Sumi Rivera was immediately sentenced to 16 years to life in state prison after pleading guilty to second-degree murder and admitting that she used a knife during the attack on her mother, Margaret Yamaguchi.

Rivera, 44, was spending the night in her mother’s room at the facility in the 800 block of West San Bernardino Road when she got up in the middle of the night and stabbed her several times on Sept. 7, 2015, according to Deputy District Attorney Lauren Guber.

An emergency call was made from the room during the attack, and employees of the facility found the victim bleeding heavily. Yamaguchi was pronounced dead at the scene.

Rivera was arrested about a half-hour later and has remained behind bars since then.

There was no word of what may have prompted the attack, nor what kind of relationship the mother and daughter had endured.

[symple_googlemap title=” 800 block of West San Bernardino Road ” location=” 800 block of West San Bernardino Road ” height=”300″ zoom=”15″]

–City News Service 

Leave a comment

Your email address will not be published. Required fields are marked *