Sally Scientist was sitting in her apartment at her computer, studying the cycling of matter. She was looking at this really neat website talking all about the biogeochemical cycle. She was really focused on the water, carbon/oxygen, nitrogen, and phosphorous cycles. She could not believe how difficult it was for life on earth to survive! She was learning more about all these cycles when she heard a noise. She thought maybe it was her lab rat, Hairy, but then she suddenly blacked out as someone slammed a lamp into her head, knocking her unconscious. Her neighbors heard the commotion, so they called you, the Hasboro Police Force, to investigate. Sally has been taken for treatment to the local hospital, but it's up to you to piece together the puzzle to figure out who was in Sally's home and why were they there?