MSNBC: A neighbor told WPIX that he heard a man shouting Biblical passages "like repent, repent, repent."
Brea, 31, was later taken into custody, WPIX said.
The New York Daily News reported that Yannick Brea, 55, was stabbed repeatedly with a sword. WPIX reported that she was found decapitated.
Religion and insanity: deadly mixture.