The bodies of the mother and daughter were found Thursday, Feb. 16, inside their home at the Oliver Crossing Apartments near Mosby Court in the East End. Police said the women were the victims of a double murder-suicide in which Walter Gaines III, Shaquenda’s 23-year-old estranged boyfriend, shot and killed them before turning the gun on himself. In addition to her sisters, Ms. Walker is survived by her two young children, who may have witnessed the fatal shootings.