Ronald Friedfertig, 62, was taken into custody for questioning hours after police responding to a 911 call about a foul order Monday night discovered the body of his 57-year-old wife, Yevonne Gefne, in the couple's Avenue N home in Midwood.
Gefne had been stabbed multiple times and also had head trauma.
When police responded and found the body and note, neighbors told investigators the pair hadn't been seen for weeks and that the husband had psychiatric issues, sources said. Police then found Friedfertig at Kings County Hospital's psychiatric ward, where he had a broken neck and arm.
He was questioned and later arrested on murder and criminal weapons possession charges. Information on an attorney for Friedfertig was not immediately available.
Neighbors told police the pair have been together for about two years.