Use black light with fingerprints on the key cards and match with fingerprint transparency from Alayna Hubbard’s to match to Alayna’s case and to know which floor the killer had access to. In this case, we match Alayna’s killer’s print to the 2nd floor key card.
Cross reference storage room closing checklist with MSDS to see what rooms the chemicals were in. The MSDS states that both chemicals should be stored in a dry environment and not in the same location as flammable, combustible or oxidizing agents.
The chemicals could only be stored in 2 of the rooms:
• Storage Room A contains flammable chemicals, so the chemicals would not be stored here.
• Storage Room B contains a humidifier, indicating it is not a dry environment, so the chemicals would not be stored here.
• Storage Room C is a possibility as it is a dry environment with no flammable or combustible agents.
• Storage Room D contains flammable chemicals, so the chemicals would not be stored here.
• Storage Room E contains oxidizers, so the chemicals would not be stored here.
• Storage Room F is a possibility as it is a cool environment with no flammable or combustible agents.
Cross reference the Clearance Sheet with the Employee List to see which jobs had access to what floors. The Archivist, Janitor and Management have access to rooms C and F according to the Security Clearance Sheet. Of these, only the Janitor has Floor 2 Key Card Access. As a result, the Janitor, Jeffrey Vulpes is the killer.