Rock Star's Mother-in-Law Still Missing as Search Widens

The search grew on Monday for a woman with Alzheimer’s disease who disappeared from a Julian campground over the weekend without a trace.

Sally Estabrook, the 75-year-old mother-in-law of Megadeth frontman Dave Mustaine, was last seen around 4 p.m. Saturday at the Pinezanita RV Park & Campgrounds on Highway 79. The woman’s husband said he finished taking a shower and realized she was gone.

Officials worry about her safety considering the nearby canyons and the hot conditions. They also worry she’ll be exposed to the elements.

About 30 searchers scoured the campground Monday morning and after finding no trace of her, expanded the search to outside perimeters about five miles from where she disappeared.

Mustaine, a La Mesa native, was at the search site on Monday, officials said.

He tweeted about the search efforts on Monday morning:

His daughter, Electra Mustaine, also tweeted about Estabrook's disappearance, showing a photo of her with her grandmother:

Dave Mustaine got his start as Metallica's lead guitarist before forming the thrash-metal band Megadeth more than 30 years ago.

He stays close to his roots in San Diego County. He now lives in Fallbrook, and earlier this year, he joined the San Diego Symphony for a special one-night performance as a guest guitarist.

Joining the search efforts on Monday for Mustaine's mother-in-law were search dogs, teams from Riverside and San Bernadino counties as well as BORSTAR (Border Patrol Search Trauma and Rescue).

They will continue their efforts until midnight.

Sheriff's officials are asking anyone with surveillance video from their home or business near the campground to come forward. They believe the footage could offer clues as to where Estabrook went.

“If anyone knows where she is or has seen (her), we urge you to please call your local law enforcement or the number for the search and rescue team and please, please speak your part because we miss her and we want her back,” said family friend Jordan Faintuch.

They say because of her Alzheimer's, Estabrook is not very communicative, but she may respond to her name.

Estabrook is described as 5 feet, 4 inches tall and 145 pounds with shoulder-length blond hair. She may be wearing a teal shirt and white capri pants. She isn't very communicative but may respond to her name, according to officials.

Anyone who sees Estabrook is asked to call 911.

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