Update: Medical examiners have confirmed that the body found is that of Dave Mustaine's mother-in-law Sally Estabrook.

Sad news to report this Thanksgiving, as authorities believe they have found the body of Megadeth frontman Dave Mustaine's mother-in-law Sally Estabrook, who went missing in early October.

According to CBS 8, the San Diego County Sheriff's Department reports that a body closely matching the description of the 75-year-old Estabrook was found Wednesday in shrubs about a half mile near the campsite where she went missing on Oct. 4. Estabrook had suffered from Alzheimer's disease.

Over the past several weeks, search and rescue teams along with hundreds of volunteers had spent time searching for Estabrook. Mustaine, who had joined the search, had hoped that a caring person had found his mother-in-law and taken her in, but unfortunately that seems like it's not the case.

Mustaine posted the following message to his Facebook page:

We'd like to send our best wishes to the Mustaine and Estabrook families during this very difficult time. A TV news report can be seen below.

CBS News 8 - San Diego, CA News Station - KFMB Channel 8