PHOENIX — Authorities are trying to determine how human remains found in a splintered box ended up in a remote part of the desert in Yavapai County on Monday.

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According to the Yavapai County Sheriff’s Office, the remains of a splintered box and human bones were discovered by a man grading the desert with a tractor.

Sheriff’s deputies called in search and rescue dogs and officials from the medical examiner’s office, expecting to find clues to a r

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