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Dave Mustaine is asking for everyone's help as the search for his mother-in-law continues. Sally Estabrook went missing from a campsite in southern California on October 4th, and the Megadeth frontman and his wife held a press conference in San Diego on Friday to offer an update and thank everyone who has helped so far. 

Mustaine and his wife Pam said the search for the 75-year-old Estabrook, who suffers from Alzheimer's disease, has expanded beyond the camping area. 

A spokesman for the San Diego County Sheriff's Department says they've had hundreds of volunteers looking for Estabrook.  He said they're hopeful that this will remain a search and rescue operation, but admitted that the chances of her surviving on her own are slim. 

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