In season 5, episode 15, titled " Sisterhood ," the Intelligence Unit tracks a vigilante who is targeting and killing known rapists. The case becomes deeply personal for Detective Kim Burgess, as it resurfaces memories of her own sister’s assault and leads her to question if her sister's attackers were ever truly punished. Key Plot Highlights
Burgess witnesses an informant receiving a gun but hesitates to report it, secretly wanting the vigilante to "take the shot". [S5E15] Sisterhood
After the vigilante kills her target, Voight comforts Burgess and suggests Chicago is better off without the criminal, leading some fans to believe he may have even helped facilitate the vigilante's actions. In season 5, episode 15, titled " Sisterhood