Dear buttons06 - first off, I'm so sorry for your loss. I'd like to try to help you find out more about your mother, if I can. I did a cursory search of California newspapers from 1961 to 1966 to find out if the news of your mother's adoptive parents and their accident was in the papers. There were several accidents that I found in this time period that involved a married couple where they both died, however, none listed any children named Sherry or Sherry Ann. As Sherry Ann's daughter, I think you would be able to access records in California that an average citizen might not be privy to. The California Department of Public Health or the California Highway Patrol might have a record of the parents' accident. If you can find out their names, we can go from there in finding more information in your mother's history. I'll keep poking around and see what I can find on my end. If we can find the couple, we can find where they lived, and we can find a photo of your mother in her school yearbook.