Authorities said Tuesday the case was considered suspicious because of some details at the scene in Castleton, a Vermont television station reported. They did not elaborate.
Patrick Farrow, 66, a sculptor, was discovered by his wife Monday night, police said. Susan Farrow, also an artist, made a frantic 911 call.
The Office of the Chief Medical Examiner in Burlington will be conducting an autopsy, after which more information will be available, police said.
Patrick was Mia Farrow's older brother and one of seven siblings born to author John Farrow and actress Maureen O'Sullivan.