This is the disappearance of 75-year-old Flossie Wilbur on August 24, 1985 from Angelica, NY. 

https://buffalonews.com/1992/08/23/vanished-flossie-wilbur-was-a-little-hard-to-take-right-up-until-the-last-time-she-was-seen-alive/

https://www.wellsvilledaily.com/x1838109391/Flossie-Wilbur-vanished-while-emptying-her-car-of-groceries

https://www.newspapers.com/newspage/137233636/

https://www.the-leader.com/news/20161206/cold-case-tuesday-state-police-feature-flossie-wilbur-case