For the record, US citizens are allowed to stay in France without a visa for 90 days, so Denise should be able enter the country without any issues. (At border control she should better hope though that word didn't get out yet about her complicity in accidental diplomat-slaying....)
Next up, the day after tomorrow: The epilogue!
(Yes, this "Denise's Diary" act has an epilogue!)
private aircraft get a whole lot less scrutiny than commercial aviation, because only the plebes use commercial