"No one had figured out any of the other murders he'd done, had they?" This suggests that Gary was an extremely elusive and dangerous killer, having murdered more than John Wayne Gacy, Jr. and Jeffrey Dahmer combined, yet still remaining unidentified and untracked by authorities.

According to the narrator, "Gary had murdered more than both of them put together. But no one knew who he was, or where he was, or what he planned to do next." This highlights his mysterious and unpredictable nature, emphasizing the threat he posed due to his secrecy and the lack of knowledge about his identity and motives.