On a Tuesday in June of last year, a retired Washington, D.C., detective named Johnny St. Valentine Brown Jr. walked into the offices of Bode & Beckman and lied through his teeth.

During his deposition at the firm’s Connecticut Avenue offices, the nattily dressed Brown told attorney Peter C. Grenier that his qualifications as a drug expert included master’s and Ph.D. degrees in pharmacology that he earned from Howard University between 1968 and 1972.