Nearly 100 women, fearing that a Johns Hopkins gynecologist secretly videotaped and photographed them, contacted police Tuesday, and some potential victims reached out to private attorneys contemplating legal action. Police revealed Tuesday that at least some of the images were captured with a camera hidden in the top of a pen, and authorities were exploring whether the recordings had been distributed. The doctor, Nikita A. Levy, was found dead of an apparent suicide Monday. Police are treating the case as an open criminal investigation, and the Johns Hopkins board of trustees has opened a separate inquiry.