Annie Le entered Yale's research complex on September 8, 2009 and never came back out. The building was secure, monitored, and full of people who knew how to move through it. This video examines the keycard records, surveillance trail, and laboratory search that focused investigators on Raymond Clark III. The case raises a disturbing question: can a place designed for security still conceal a crime from the people working inside it? If you enjoy contained mysteries, workplace investigations, and evidence that changes a suspect list, this case is for you.

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