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From The Perry Mason TV Show Book (Revised)
Tryon Laboratories hires the Drake Detective Agency to protect their latest formulas. In spite of Paul’s best efforts, there is a leak in security and some top-secret information is stolen.

One night, Horace Lehigh, an undercover agent working for Dr. Scranton, the head of the company, calls from the lab to say he knows the identity of the spy. Both Scranton and Paul rush to the lab and find Lehigh dead, floating in a vat of water.