Lieutenant Eric Whaley is a firefighter who was filling in for Severide after the experimental surgery and the brother Renée Whaley. He apparently had it out for Kelly after he dumped Renée 2 days before their wedding date, especially when she was in a three month coma after drinking down her pain and getting in a car wreck, and never heard anything from Kelly. He learned from Shay about Renée cheating on Kelly with an ex-boyfriend and expressed how she barely spoke to her family, let alone can be difficult to find.