Article content We apologize, but this video has failed to load. Try refreshing your browser, or HUNTER: Who killed travel agent Dianna Sandeman? And why? Back to video But in summer, who is a victim and who is a killer is dramatically less predictable. And the numbers are always higher. Toronto cops list 69 unsolved murders with a July date. The oldest case being the July 17, 1965 murder of Marianne Jang, 30, whose lifeless body was discovered along the waterfront. At 15-years-old, Tahj Loor Walters was the youngest victim. He was shot on July 28, 2013, and died two weeks later of his injuries. Some of the unsolved slayings are three-quarters of the way to being moved from red to black on the big board.