POLICE SHIFT VIEW ON BACKUP TEAMS
NYC Police Dept, which on Jan 28 authorized 7,000 additional tours of duty at overtime pay in wake of two ambush shootings of 4 policemen, calls off overtime on Feb 13 as econ measure; Asst Police Comr D M Landi says that backup teams will continue to follow regular patrol cars, but on 'tailored programs in critical areas and at critical times' with regularly scheduled tours of duty; PBA head McKiernan issues immediate protest; accuses Lindsay and Comr Murphy of 'reneging' on committment to continue extra tours of duty for backup teams 30 days; calls on Lindsay and Murphy to fulfill their committment