A Solano County Superior Court jury on Tuesday found that Monica McCarrick, 29, was sane when she used a sword to kill the 3-year-old twins, Tori and Lily Ball, on Oct. 10, 2010, according to the Solano County District Attorney's Office.
The jury convicted McCarrick on June 15 of two counts each of first-degree murder and assault on a child causing death.
McCarrick had pleaded not guilty and not guilty by reason of insanity. She will be sentenced on Aug. 6.
Her daughters were found dead near the door of McCarrick's burning apartment. They died of multiple stab and slash wounds from a samurai sword.
Fairfield police said McCarrick had tried to commit suicide after the killings by cutting herself and lighting fire to her third-floor apartment at the Summit at Paradise Valley complex at 3001 N. Texas St.
