JUDGE ATTACKS U.S. CONDUCT
Former Los Alamos scientist Wen Ho Lee leaves court a free man after pleading guilty to single charge of mishandling nuclear secrets; Judge James A Parker apologizes to him for prosecutors' conduct in case; government virtually abandons its case against Lee, who spent nine months in prison awaiting trial that will now never take place; Judge Parker says he improperly denied bail to Lee because he was 'led astray' by executive branch; judge implicitly singles out Atty Gen Janet Reno, Energy Sec Bill Richardson and senior officials in Clinton White House for what he says was questionable indictment and for misleading him about Lee's supposedly deceptive behavior and then for ignoring his urgings that goverment ease 'demeaning, unnecessarily punitive conditions' under which Lee was being held; Atty Gen Reno and FBI Director Louis J Freeh are unapologetic about actions of prosecutors and agents; photos (M)
