A New Hampshire prep school that has educated some of the nation's elite is confronting a campus practice of sexual conquest after a senior boy was charged with raping a 15-year-old freshman girl last year.

In a series of letters over the past year to students and parents of St. Paul's School, Rector Michael Hirschfeld says the school has re-examined campus culture to see how the "Senior Salute" was allowed to develop.

Nineteen-year-old Owen Labrie of Tunbridge, Vermont, is charged with multiple felonies, including rape. Prosecutors say he raped the girl in an academic building last year as part of "Senior Salute," in which seniors try to have sex with underclassman.

Labrie has pleaded not guilty. His attorney says the two had consensual sexual contact but not intercourse.