Phillips Academy, the prestigious boarding school already marred by alleged instances of sexual abuse by former faculty members, said an investigation has uncovered more instances of such abuse, as reported by

Two former faculty members, Brian Davidson and Frederic Lyman, were accused of abusing students in the 1970s, John Palfrey, the head of school, wrote in an email to the school community Monday. The findings come as a result of an independent law firm hired by the school.

The school last year alleged five former teachers were involved in sexual misconduct in the ’70s and ’80s.

The latest report also said investigators determined there were another four cases of sexual misconduct, three involving former faculty members and one involving a student. The school did not release their identities.

Lyman was one of a dozen former educators who allegedly sexually abused students at the prestigious Choate Rosemary Hall in Connecticut. A report issued in April by an investigator hired by the school said Lyman allegedly had sexual relationships with two 16-year-old students in the 1980s. Lyman was an English teacher and coach at Choate.

“Due to my own immaturity, I considered my students to be peers and friends, which was a mistake that I will regret for the rest of my life. I am deeply sorry for any pain or discomfort my actions may have caused,” Lyman said in a statement sent to The New York Times earlier this year about advances he allegedly made toward a Phillips Academy student.