18-Year-Old Cold Murder Case Solved – Arrest Made

In May 2003, unidentified human remains were found buried in a shallow grave near Shady Rest Park in Mammoth Lakes, CA. Initial investigation determined the remains were those of an adult female, approximately 30-40 years of age, with Native American ancestry from the southern region of Mexico.

Recently, with the advancements of DNA technology, investigators were able to identify those human remains to be that of a person positively identified as 30-year-old Isabel Sanchez Bernal, from Puebla, Mexico. Since the remains were identified, investigators have been working to solve the murder of Isabel.

On Friday, August 13, 2021, 47-year-old Mammoth Lakes resident Diego Santiago Hernandez-Antonia was arrested and is being held at the Mono County Sheriff’s jail facility on a no bail arrest warrant for the murder of Isabel.

The Mono County District Attorney’s Office is asking for the public’s help in obtaining more information about Isabel. Anyone who may have known Isabel or anyone who has information relevant to this case is asked to please contact either Chief DA Investigator Chris Callinan 760-858-2127 or DA Investigator John Estridge at 760-546-5129.

(Provided by Mono County District Attorney’s Office)