Updated

A jury in southeastern Michigan has found a 61-year-old woman guilty of first-degree murder in the killing and dismemberment of her adult son.

The Macomb County Circuit Court jury on Monday convicted Donna Scrivo of first-degree murder and mutilation of a body.

Prosecutors say Scrivo filed a missing person's report in January 2014, telling authorities that 32-year-old Ramsay Scrivo left their St. Clair Shores home and failed to return. Bags containing his body parts were found a few days later in St. Clair County, northeast of Detroit.

An electric saw was in one of the bags.

Donna Scrivo says an unidentified man entered their house and killed her son.

First-degree murder carries a mandatory penalty of life in prison without possibility of parole under Michigan law.