Angel Flight, or any medi-vac type of crash always hits me harder than most. My life was saved after a car wreck by life flight, and the people flying any of these types of missions - be they fixed wing, rotor, Angel Flight, or whatever have my deepest appreciation.
Not to jump ahead too much, but it is reasonable to conclude that some kind of litigation may occur - it just happens. Angel Flight needs our support and help, so when making a charitable donation they would be someone to think of. Additionally, AF and others almost always need volunteers. If you are not financially capable, your work volunteering is also an extrememly valuable contribution.
My prayers to all involved.