The first mass shooting of the modern era occurred in Austin, Texas, on Aug. 1, 1966. Before police killed him, Charles Whitman would be responsible for the murder of 17 and the wounding of 31. But the tower murders weren’t the beginning of the carnage.

The night before, while his mother and wife were sleeping, he had already stabbed them to death. Coverage of the campus massacre virtually eclipsed the women’s stories. But Unheard Witness: The Life and Death of Kathy Leissner Whitman, by Jo Scott-Coe, aims to change that.