(Fox News) A Johns Hopkins Hospital gynecologist accused of secretly videotaping patients wore a pen around his neck that may have been used to conceal a camera, according to the employee who reported the doctor.

The employee told hospital officials of her suspicions Feb. 4, according to a letter from the hospital’s CEO, Dr. Paul B. Rothman. The letter was dated Tuesday and sent to the law firm of Silverman Thompson Slutkin & White, which is working with the Maryland Crime Victims’ Resource Center. The law firm gave a copy of the letter to The Associated Press on Wednesday.

The employee’s report to officials ultimately led to the discovery that Dr. Nikita Levy had been recording patients during exams at a Hopkins clinic. Police have said Levy, 54, killed himself in his home on Feb. 18.

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