OAKLAND TOWNSHIP, Mich. - The excavation of a rural field in suburban Detroit has failed to turn up the remains of former Teamsters union leader Jimmy Hoffa, the FBI announced Wednesday, adding another unsuccessful chapter to a nearly 40-year-old mystery.

"We did not uncover any evidence relevant to the investigation on James Hoffa," said Robert Foley, head of the FBI in Detroit.

Authorities have pursued multiple leads as to Hoffa's whereabouts since his disappearance in 1975.

The sly smile on Erik Spoelstra's lips said it all.

This was just minutes after a magical Game 6, when the memories of how his Heat defied the longest of odds to steal a win in overtime were still fresh: Down five points with just under 30 seconds left in regulation, against a San Antonio team and a coach, Gregg Popovich, who never lose their composure or cool.

The championship trophy was on a platform being rolled toward the court, yellow tape stretched on either side of its path, clearing a route through a fast-departing home crowd determined to flee rather than watch the hardware be handed to the Spurs.