 Bonnie had been smothered. It's been suggested that this could have happened to the Grimes sisters, too. The site where Bonnie's body was found is in the same general area on the southwest side as the place where Barbara and Patricia Grimes were found. Not far from both sites is Santa Fe Park, which was searched thoroughly for clues in the Grimes case. Milk was told investigators that he frequently went to the races in that park.