THE FIRST SECTION CONSIDERS INVESTIGATIVE METHODS AND PROCEDURES SUCH AS CRIME SCENE SEARCH, PHOTOGRAPHY, AND SKETCHES. THE SECOND SECTION COVERS INTERVIEWS, INTERROGATIONS, ADMISSIONS, CONFESSIONS, WRITTEN STATEMENTS, AND RECORDING OF INFORMATION. USE OF INFORMANTS IS CONSIDERED AS WELL AS TRACING AND SOURCES OF INFORMATION. THE THIRD SECTION IS DEVOTED TO CHARACTERISTICS OF CERTAIN CRIMES SUCH AS ARSON, NARCOTICS VIOLATIONS, SEX OFFENSES, BURGLARY, ROBBERY, HOMICIDE, AND FORGERY FROM AN INVESTIGATIVE VIEWPOINT. QUESTIONS ARE INCLUDED ON RULES OF EVIDENCE, COURT TESTIMONY, IDENTIFICATION OF WITNESSES, AND OBSERVATION AND DESCRIPTION. USE OF INVESTIGATIVE TECHNOLOGY IS COVERED AND CHAPTERS CONSIDER FINGERPRINTING, LAUNDRY AND DRY CLEANING MARKS, CASTING AND MOLDING, IMPRESSIONS, STAINS, AND CHEMICAL ANALYSIS. FIREARMS, INTOXICATION TESTS TRACING MATERIALS, HAIR AND FIBERS, AND INVISIBLE RADIATION ARE FORMS OF EVIDENCE CONSIDERED. ISSUES INVOLVED IN USING AND PRESENTING DOCUMENTARY EVIDENCE ARE DISCUSSED. THE FINAL CHAPTERS CONSIDER ARRESTS AND APPREHENSIONS, SEARCHES OF SUSPECTS, AND RAIDS. ANSWER KEYS ARE PROVIDED. FOR THE TEXT OF THE FOURTH EDITION, SEE NCJ-37570. (DAG)