Benjamin Horlacher was a Naval officer who was a part of Guyman Purcell's class. As well as that, Horlacher was a closet transsexual who cross-dressed, preferring to wear women's clothing. Horlacher soon received a pair of human eyeballs in the mail from a mysterious source which prompted NCIS to investigate with Special Agents Leroy Jethro Gibbs, Anthony DiNozzo and Caitlin Todd later interviewing Horlacher in hopes of finding out who could have sent him the package but Horlacher insisted he didn't know anything.