Exact details of Jackson death still unclear (AP)

LOS ANGELES – The final act of Michael Jackson's life came into clearer focus Friday, a picture of a fallen superstar working out with TV's " Incredible Hulk " and under the care of his own private cardiologist as he tried to get his 50-year-old body in shape for a grueling bid to reclaim his glory.

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While the exact circumstances of his death remained unclear, early clues suggested he may simply have pushed his heart too far. Police said they had towed the doctor's BMW from Jackson's home because it may include medication or other evidence, and a source familiar with the situation told The Associated Press that a heart attack appeared to have caused the cardiac arrest that led to the pop icon's sudden death.

Full Story: Exact details of Jackson death still unclear (AP)