Later, at Detroit airport, the tiniest thing - in a cafe, a man saw another customer's suit-bag flop onto the ground at a nearby table, into the path of oncoming travellers and their wheelie bags.

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Another photo that was spread over the Internet shows Phelps in a three-piece suit with a Louis Vuitton bag at his feet.

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Dressed in an olive-green suit and tie and carrying a black bag, Mr. Johnson hid behind a van outside the firm's office, then approached Mr. Ercolino and shot him once in the head with a .45 caliber semiautomatic handgun, authorities said.

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