The Specific Smell
Whenever the police officers went into the apartment, they smelled something strong hanging in the air. However, they didn’t know what it was and were focused on Hanna. Once they got to the bedroom, they knew it all started there.
Mold
Once Sophie and Hanna were in the ambulance, the cops investigated, finding mold in the closets, around the bed, and even in the ceiling. It was spreading throughout the apartment and was the reason Hanna had gotten sick. She could have died!