Federal investigators say it could make six months or more before they rule on what caused a small plane to crash in southeastern Indiana, killing all four people on board.
The single-engine plane being flown by 46-year-old Donald Horan of Greensburg crashed Sunday evening into a wooded area near the city's airport during in foggy, misty conditions.
National Transportation Safety Board investigator Stuart Bothwell tells The Indianapolis Star (http://indy.st/Yzy3kz ) that Horan's plane is a complex pressurized model with modern avionics.
Others killed in the crash were Horan's 44-year-old wife Barbara and their friends 45-year-old Stephen Butz and his 42-year-old wife, Denise. They were returning from a trip to Florida.
A joint funeral for all four is set for Friday at the Greensburg High School gym.