Authorities in San Diego County are searching for a missing woman with Alzheimer's disease who is the mother-in-law of Megadeth frontman Dave Mustaine.
U-T San Diego reports 75-year-old Sally Estabrook was last seen Saturday at an RV park and campground in Julian.
Search-and-rescue teams from four counties and the U.S. Border Patrol fanned out Tuesday (Oct. 7) in an area near state Route 79 to look for her.
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