Was this missing North Dakota woman the victim of America's oldest serial killer?

Sharon Hensley left her home in Bismarck, North Dakota, in the summer of 1970 with peace and love on her mind. She wanted to experience life in a way that she hadn't before, alongside fellow free spirits etching their existence into the aftermath of the now famous "Summer of Love." San Francisco was Hensley's ultimate destination. She succeeded in her journey, yet the life that unfolded looked nothing like the idyllic lifestyle Hensley dreamt up in her North Dakota bedroom. Instead, that life intersected with Felix Vail, her one-time boyfriend who is now known as the nation's oldest serial killer.   https://www.inforum.com/news/the-vault/missing-north-dakota-woman-may-be-victim-of-nations-oldest-serial-killer