WORCESTER — A city man has been indicted on a murder charge in the Dec. 30 slaying of his 56-year-old mother.

A Worcester County grand jury handed up an indictment Thursday in Worcester Superior Court charging 27-year-old John Madulka of 29 Bailey St. with murder in the death of his mother, Ellen Madulka. Mr. Madulka, who reportedly has a history of mental illness, was previously charged in Central District Court and was committed to Bridgewater State Hospital for a psychiatric evaluation.

Thursday's indictment will move the case to Worcester Superior Court.

Police responded to 29 Bailey St. about 11:30 p.m. Dec. 30, after Mr. Madulka's father made a 911 call saying his son called him and told him he had killed his mother. Investigators were able to find Mr. Madulka at a Dunkin' Donuts on Chandler Street.

Mr. Madulka allegedly told police he had recently been thinking about killing his mother and that during the alleged assault, he struck her in the head 10 times with a "metal staff," according to court documents. He then stabbed her, court records state.

A forensic psychologist who examined Mr. Madulka when his case was pending in the district court said he cut their interview short, but that she was able to determine he had not been taking his prescribed medications for several months, triggering "acute symptoms" of schizophrenia.

His lawyer, Michael S. Hussey, said then that he believed Mr. Madulka was "tremendously sick" and "tremendously confused" at the time of the slaying.