In 1992, the U.S. space shuttle Endeavour took off with a crew that included Mark Lee and Jan Davis, the first married couple in space.

CNN: Friday,

Lewis said he couldn't discuss the investigation in further detail, including how the couple died and whether authorities believe their deaths are linked to the Jan. 31 fatal shooting of Mark Hasse, an assistant Kaufman County district attorney.

NPR: Texas District Attorney, Wife Found Dead At Home

Mark Weir's partner Jan Wilkinson told the inquest he was an experienced pilot who did not take unnecessary risks and she had witnessed him getting out of difficulties while flying before.

BBC: Mark Weir inquest: Helicopter crash death 'accident'