A Westchester man has been arrested for the murder of his mother.

Police arrested 54-year-old Richard Keller, of Harrison Tuesday.They say the former cab driver repeatedly stabbed his 85-year-old mother after a disagreement New Year's Day at her apartment in Manhattan. Officials say Keller even called police to tell them what he had done. Officials believe Keller may have a stash of weapons in his home. Police describe Keller as being emotionally disturbed.

Keller was arraigned on a second-degree murder charge and criminal possession of a weapon.