WHO KILLED BARBARA LARSON?

As reported by https://www.websleuths.com/forums/threads/barbara-larson-25-who-was-bludgeoned-to-death-on-november-1971-in-her-trailer-home-near-howard -city-mi.635474/ , Barbara Larson was killed on November 16, 1971 in her camper van in Howard City, Michigan. The victim was beaten and hit with a bookend. Since it is an object found in the house, we cannot fail to notice the correlation with the Boston strangler, even more so if