Blindside - please be aware that the above is your opinion, and not categorical fact.
To my eyes, Corbin is right to require more information than the hypothetical gave him, and there's no way the intelligence services wouldn't be able to provide more information. If they can't give more info then there's not enough to act.
Equally to my eyes, trial is always preferable to extrajudicial killing. No it's, not buts, no maybes; it is always preferable, and what the American marines did with Osama was wrong, wrong, wrong. Of course, bringing to trial is not always possible, but it is always preferable.