What would you do in this situation?

You are stranded on an island in the South Pacific with Osama Bin Laden. Over the years you were stranded you talked to him.(we'll assume he speaks English) He has expressed no regret over his actions, but is agreeing with you on your point of view about not killing to get your point accross and promises that if he gets off the island that he will leave terrorism behind him. Neither one of you looks like you did when you first got to the island as 5 years of nothing but fish and coconuts has left you much skinnier and you both have aged considerably, you don't know if anyone will recognize you. After 5 years together, a U.S. Navy plane spots your fire, while Osama is hidden in the forest tending to his daily business, and flies over. It comes back the next day and drops a box of supplies. You find a note that says a ship will be picking you up the next morning. Along with the note you find food, water, blankets, new clothes, rope, toiletries, fishing equipment, and a loaded pistol. The supplies have been packed in newspapers dated less than a year ago, they detail several terrorist attacks linked to Al Qaida that have left nearly 500,000 people dead all over the world, including a biological attack that killed 100,000 in Los Angeles. Osama sees the articles and is visibly happier, although he expresses regret for what happened. You know you can shoot Osama and hide the body so no one knows what you did, or you can shoot him and bring his body back as evidence of his death you might figure you'll be considered a hero, you can wait and turn him in to the ship's captain, or you can do nothing- taking him at his word that he'll change. The question before you now is, what will you do and why? (you are not limited to my four suggestions, if you can think of another solution please elaborate.)