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GRAND CANYON NATIONAL PARK, Ariz. (AP) - An autopsy says a Colorado woman whose body was recovered from a river at the Grand Canyon in March accidentally drowned.

Kaitlin Anne Kenney, of Englewood, was reported missing Jan. 12 from a private rafting trip. She last was seen at a camp near Tapeats Creek on the north side of the Colorado River and an extensive search turned up no sign of her.

Kenney's body was found March 22 about 30 river miles from where she was reporting missing.

Coconino County officials said Friday that the medical examiner's autopsy report lists the cause of death as drowning and the manner as accidental.

The river trip was Kenney's first at the Grand Canyon. Kenney's mother believes her daughter fell into the river at nighttime, possibly trying to use the restroom.