O’Melveny & Myers, fighting to dismiss a state suit brought by alumni of an elite Brooklyn prep school that was represented by the firm in a prior federal action, said the alumni cannot sue the firm with “previously abandoned” claims of purported deception on the courts.

In December, 10 Poly Prep Country Day School alumni and two former summer camp participants settled a closely-watched Eastern District lawsuit stemming from alleged decades of abuse by the school’s football coach, Philip Foglietta, now deceased, and the school’s concealment of the actions.