WHO KILLED PAULA JEAN OBERBROECKING?

As reported by https://iowacoldcases.org/case-summaries/paula-oberbroeckling/, Paula Jean Oberbroeckling (recently graduated from George Washington High School) disappeared on July 11, 1970, after moving away from her home, (located at 116 South West 10th Street in Cedar Rapids, Iowa), in the car of her friend Debbie Kellogg after an argument with her boyfriend Lonnie Bell, whom she was