An alleged JetBlue pilot who was facing child sex abuse charges shot and killed himself Friday morning at a train station.

Betsy Arakawa died from hantavirus pulmonary syndrome, a rare rodent-spread disease with a mortality rate up to 50% in the American Southwest, officials said. Gene Hackman died of heart disease, while his wife Betsy Arakawa's cause of death was hantavirus pulmonary syndrome. But questions remain about how their dog Zinna died in a crate.