OH OH- Mary Petry, 20, & William J. Sproat, 22, bound w. metal coat hangers, S.A., stabbed & bludgeoned w, bowling ball, OSU, 28 Feb '70, *DNA, REWARD*

Finding out who killed 20-year-old Mary Petry and her 22-year-old boyfriend William Sproat at a home near Ohio State University's campus in 1970 would only bring small satisfaction to Mary's twin sister, Martha.

"I really would like to know why," Martha Petry said. "That's much more important than any punishment."


Martha Petry said she still has letters that her twin wrote her, every line crammed with information about Sproat, from what restaurant they had eaten at to how the pair enjoyed speaking in French to each other.

Petry said she and Sproat's sister both believe the person who killed their siblings may have known them because of how violent the crime was. The attempt to use new technology to try and find answers about what happened is a blessing for Petry.

"This is not about justice, it's more about mercy," she said. "The mercy is knowing the mystery. It has always been there, but it wasn't something that I could dig into because it had such an emotional weight to it, but during COVID, after I had retired, there was a new sense of asking why."

Should the evidence at the scene yield a potential genealogical match, Petry said she knows it may not give her the answers she's looking for about why her sister had to die.

"My universe is not one that's about an eye for an eye," Petry said. "There may be a reason. There may be understanding of something that I don't understand."

 
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Very lengthy, rbbm
''William “Bill” Sproat, a graduate student at Ohio State, and Mary Petry, a third-year at the College of Mount St. Joseph in Cincinnati — both introverted, devout Catholics — first met through a mutual friend. Their shared love and practice of French culture took care of the rest.''

"The circumstances of the crime were especially shocking and confusing to the Sproat family, Loeliger said, because of Bill Sproat’s gentle nature.
“He was not a fighter kind of person,” Loeliger said. “He was quiet but fun-loving, very conscientious about his studies, yet not nerdy,” Loeliger said''.
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“All of my life I tried to be different from Mary, so bright, so brilliant, so intellectual,” Martha Petry said.
''The fact that Mary Petry was sexually assaulted, according to the police report, not only pointed to a possible motive but frightened women in the area.''

''According to the podcast, preserved DNA from the 1970 crime scene is currently awaiting analysis through an investigative genetic genealogy lab until two other suspects can be ruled out.''
 

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