LADUE, Mo. (AP) — A 79-year-old man accused of fatally stabbing his wife has been deemed mentally unfit to stand trial in the case.

The St. Louis Post-Dispatch reports Robert Britt was found incompetent Wednesday to stand trial on second-degree murder for the July 3 death of 76-year-old Georgia Britt at the couple's home in the St. Louis suburb of Ladue. They had been married for 54 years.

St. Louis County prosecuting attorney spokesman Ed Magee says Britt will be transferred to the custody of the Missouri Department of Mental Health and will be re-evaluated after six-months.

Police say Britt told his brother and officers that he had stabbed his wife in the neck.

Georgia Britt was a retired anthropology and archaeology professor. Robert Britt was a lawyer and former special assistant county counselor.

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Information from: St. Louis Post-Dispatch, http://www.stltoday.com