A former Commack resident entered a plea of not guilty Wednesday morning in Albany County Court to an indictment charging that she murdered her physically disabled son by stabbing him to death in their Westerlo apartment two months ago.

Tracy Zetzsche, 52, entered the plea to a charge of second-degree murder, the single count of the indictment, according to the Albany County district attorney's office and the Albany public defender, which represents the woman.

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No future court day was set, and Zetzsche was being held without bail at the Albany County Correctional Facility.

The body of Gabriel Philby-Zetzsche, 22, was discovered July 31 in a house southwest of Albany where he and his mother had lived for about a year after moving from Commack, police said.

Albany County Sheriff Craig Apple said at the time there was no indication of strife between the woman and her son, a graduate of Commack High School, and that the victim had been dead for about five days before a relative found the body.

Philby-Zetzsche apparently had limited use of one of his arms because of cerebral palsy, Apple said at the time. He said an autopsy showed he was killed by a stab wound to the chest and multiple blunt-force stab wounds.