Top officials of an elite New Hampshire prep school dealing with a flurry of sexual abuse allegations say they've hired several law firms to examine the school's handling of misconduct allegations levelled at faculty members.

In a letter to parents and alumni Sunday, the principal and top trustee of Phillips Exeter Academy say they are committed to a "thorough review" of the school's handling of allegations against former teacher Rick Schubart, who was forced to resign after admitting to sexual misconduct in 2011. He was barred from campus after a second allegation surfaced in 2015.

Principal Lisa MacFarlane says one law firm will investigate allegations that have surfaced since March of this year, when Schubert's misconduct was first publicized. Another will review the school's procedures for handling sexual misconduct complaints.