Megadeth frontman’s mom-in-law missing

Authorities in California 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 a recreational vehicle park and campground in Julian.

Search-and-rescue teams from four counties and the US Border Patrol fanned out Tuesday in an area near state Route 79 to look for her.

Sheriff's officials are asking nearby business owners to look through surveillance footage.

Estabrook is the mother of Mustaine's wife, Pam.

In a post on his Twitter account Monday, the metal singer and guitarist asked people to "please send good thoughts to Pam, and prayers from those of you who pray."

Megadeth's latest album, ‘Super Collider’, came out last year.

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