I found an obituary for Gary Branstetter from Webster Groves noting a sister that had passed prior.  Gary graduated from Webster Groves in 1968.

This is Gary's obituary: https://www.dignitymemorial.com/obituaries/dayton-oh/gary-branstetter-7827927

https://www.legacy.com/us/obituaries/thesouthern/name/penelope-steinert-jackson-obituary?id=27322317