SHREWSBURY (CBS) — A Shrewsbury man has been charged with murder in the gruesome killing of his wife.

Prosecutors say he also ate part of her arm.

WBZ NewsRadio 1030’s Mark Katic reports

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Seventy-nine-year-old Jieming Liu was arraigned Friday afternoon in Westboro District Court, a day after his wife, Yuee Zhou, 73, was found dead in their home.

Investigators said the couple’s son went to visit his parents at their condominium Thursday afternoon and found his mother on a bedroom floor, soaked in blood. Her left arm was severed below the elbow.

In court Friday, prosecutors said the flesh was missing from her left forearm and her husband had been eating it.

Her fingers were also detached from one hand.

Assistant District Attorney Michael McHugh said Liu’s son found his father sitting in a chair with blood on his hands and face. He was also said to be dazed and confused. Liu allegedly told his son, “This is not your mother.”

After Shrewsbury police questioned Liu, he was arrested and charged with murder.

Liu told police he acted in self-defense, but no other details were released about a motive.

He was sent for a psychiatric evaluation after his arraignment.

There’s still no word yet on a cause of death.

Investigators said the couple had just moved to Shrewsbury from China last fall to be with their children.

They were said to be concerned that their father was starting to show signs of dementia.