Behavior of Z Judges Is Criticized As Court Reverses 3 Convictions
NYS Appeals Ct, in rare action, overturns 3 convictions because of personal behavior of NYS Sup Ct (Manhattan) Justices Arnold G Fraiman and Burton B Roberts; ct overturns manslaughter convictions of 2 men because of 'unwarranted, persistent intrusion' of trial justice on ground that Roberts asked more than 1.300 questions; Ct also excoriates Justice Fraiman for declaring mistrial because of vacation plans; in Fraiman case, man (Eric Michael) was convicted at '75 trial trial of rape, robbery and sodomy, but court rules that retrial was prohibited under Constitution's double jeopardy rule; both Justices Roberts and Fraiman comment; their pors (M)