September 9, 2014 1:15 PM EDT

Police and forensics experts were combing the scene Tuesday for more remains of Tennessee nursing student Holly Bobo, whose bizarre disappearance in 2011 met a major breakthrough over the weekend.

Two hunters on Saturday found a human skull identified as that of 20-year-old Bobo — the first physical evidence of her remains, police said. Forensics experts from the University of Tennessee, Knoxville, are “trying to find as much evidence as they can,” Decatur County Sheriff Keith Byrd told NBC News.

A news conference is planned for Tuesday afternoon, where the Bobo family is expected to release a statement…

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