NEW : Between four and six people are believed dead , NTSB says . Ex-Microsoft executive was aboard the plane , a family member says . A former Microsoft executive and his son were aboard a turboprop airline that crashed Friday morning into two houses in East Haven , Connecticut , a family member told CNN . Comment: It was not immediately known if anyone was in the plane along with the pilot .
NEW : Between four and six people are believed dead , NTSB says . Ex-Microsoft executive was aboard the plane , a family member says . Comment: It was not immediately known if anyone was in the plane along with the pilot .