THE LAW ENFORCEMENT CODE OF ETHICS IS BROKEN DOWN AND ANALYZED PASSAGE BY PASSAGE. ILLUSTRATIONS ARE PROVIDED TO SHOW HOW THE CODE MUST BE PUT INTO PRACTICE BY THE PATROL OFFICER. TO PROVIDE A BACKGROUND TO MODERN POLICE WORK, A SHORT HISTORY OF POLICE PATROL IS PRESENTED, WITH ATTENTION TO THE BASIC DUTIES OF PREVENTIVE AND SELECTIVE ENFORCEMENT AS WELL AS TRAFFIC LAW ENFORCEMENT AND EMERGENCY AND ROUTINE CALLS FOR POLICE SERVICE. THE VARIOUS TYPES OF PATROL FOUND IN THE MODERN POLICE DEPARTMENT ARE EXAMINED, INCLUDING AIR, AUTOMOBILE, BICYCLE, BOAT, DOG, FOOT, HORSE, MOTORCYCLE, AND TELEVISION PATROL. PREPARATION FOR PATROL IS COVERED FROM THE TIME OFFICERS LEAVE HOME, PUT ON THEIR UNIFORMS, READ THE NECESSARY REPORTS IN THE SQUAD ROOM, AND CHECK OUT THEIR VEHICLES. THE FIELD TELEPHONE AND THE POLICE TELETYPE SYSTEM ARE ALSO DISCUSSED, ALONG WITH COMPUTERIZED COMMUNICATION SYSTEMS. SINCE PATROL OFFICERS MUST RELY ON THEIR SENSES, BOTH TO EXECUTE THEIR FUNCTION AND PERHAPS SAVE THEIR LIVES, EACH OF THE FIVE SENSES ARE EXAMINED AS THEY APPLY TO AN OFFICER ON PATROL DUTY. FIELD NOTE-TAKING AND CRIME SCENE RECORDING ARE DISCUSSED, AS ARE THE IDENTIFICATION AND DESCRIPTION OF PERSONS AND PROPERTY, FIELD INTERROGATION, THE STOPPING OF VEHICLES AND OCCUPANT CONTROL, THE USE OF PERSONAL PROTECTIVE WEAPONS AND OFFICER SURVIVAL, AND TECHNIQUES AND TACTICS FOR DEALING WITH BURGLARY, CIVIL CASES, DEADLY WEAPONS, DISTURBING THE PEACE, DRUNKENNESS, FIRE CALLS, HOMICIDE AND DEATH CASES, LIQUOR LAW VIOLATIONS, LOST AND MISSING PERSONS, MALICIOUS MISCHIEF, MENTALLY ILL PERSONS, SUICIDES, NARCOTICS, OBSCENE PHONE CALLS, PROWLER CALLS, ROBBERY, SEX OFFENSES, STOLEN VEHICLES, AND THEFT. FINALLY, THE PSYCHOLOGY OF COURTROOM APPEARANCE, PERSONAL APPEARANCE WHILE ON THE STAND, PREPARATION FOR TESTIMONY, TAKING THE STAND, GENERAL POINTERS IN TESTIFYING, AND THE USE OF THE CHALKBOARD ARE EXAMINED. PHOTOS, TABLES, AND FIGURES ILLUSTRATE THE TEXT. AN INDEX IS PROVIDED. (KBL)