SENATOR ACCUSES CADETS' LAWYER
Nunn charges Army defense attys are withholding hundreds of affidavits by cadets accusing others of cheating in effort to win more lenient treatment for clients; Nunn says approximately 700-800 affidavits are being withheld in attempt to blackmail acad; Berry echoes similar sentiments; calls action by attys irresponsible; says attys will be guilty of obstruction of justice if affidavits pertain to criminal rather than adm proceedings; Nunn lauds Hoffmann's handling of cheating scandal; Berry illus at com hearing with cadets (M)
