Why was he not taking his Meds?

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Feds back jet shooting
New York Daily News - 3 hours ago
By ROSE DAVIS. Law-enforcement officials insisted yesterday that two federal air marshals followed "textbook" procedures when they gunned down an airline passenger claiming to have a bomb - even as some on the plane said there was no need for deadly force. ...
Passengers heard no bomb claim before air marshals opened fire Sydney Morning Herald (subscription)
Marshals shot him anyway Hindustan Times
Reuters AlertNet - Chicago Tribune - New York Times - ABC News - all 2,469 related »
Why was he not taking his Meds?
Why was he on the plane?
Why did not the some on the plane said "there was no need for deadly force" restrain him?