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ALBERTVILLE, France (AP) - Investigators say they have ruled out problems with Michael Schumacher's skis or trail conditions in the devastating crash that left the Formula One great with critical head injuries.

But prosecutor Patrick Quincy said two minutes of footage from a camera on Schumacher's helmet showed the Formula One great was clearly skiing off a groomed trail when he lost his balance and crashed, striking a rock, on Dec. 29.

Schumacher, the most successful Formula One driver in history, is in a medically induced coma. The impact of the crash split his helmet in two, and doctors have said the protective gear saved his life.

Quincy said experts still need to go through the footage "image by image," but he said Schumacher crashed nine meters outside the marked trail.