The Westerlo woman accused of killed her disabled son was arraigned in Albany County Court on Wednesday. Tracey Zetzsche pleaded not guilty to second-degree murder. Lori Chung has the details.

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ALBANY, N.Y. -- A Westerlo woman accused of murdering her disabled son was arraigned in Albany County Court. Tracey Zetzsche, 52, pleaded not guilty to second-degree murder for the death of Gabriel Philby-Zetzsche, 22, back in July.

Philby-Zetzsche was found dead in the home the two shared on Route 143. An autopsy found he died from a stab wound to the chest, skull fractures, and brain injuries caused by blunt force trauma.

The Albany County Sheriff's Office said his body was in the apartment for several days before it was discovered by a family member.

Prosecutors say while Zetzsche has remained tight-lipped throughout the investigation, they feel they have a strong case against her.

Sheriff Craig Apple said, "We took hundreds of pieces of evidence. A lot of that evidence has started to come back that was tested for DNA. We've been able to basically exclude a third party ever being there which is a really good key for prosecution."

District Attorney David Soares said, "We're in the infancy stages. Today was just the arraignment. There is a presumption of innocence. We're looking forward to prosecuting this case and moving forward."

Zetzsche will remain at the Albany County Jail until her trial. No date has been set yet.