THIS 1975 REPORT IS BASED ON INFORMATION REGARDING OFFENSES KNOWN TO THE POLICE AND ARREST ACTIVITY AS REPORTED BY WISCONSIN LAW ENFORCEMENT AGENCIES. THE THREE SIGNIFICANT AREAS OF CONCENTRATION ARE: A GENERAL OVERVIEW OF CRIMINAL JUSTICE INFORMATION, A SUMMARY ANALYSIS OF THE DATA AND A SERIES OF DETAILED REFERENCE TABLES. THE UTILITY OF CRIMINAL JUSTICE STATISTICS, THE WISCONSIN UNIFORM CRIME REPORTING PROGRAM AND ITS CONCEPTS AND THE REASONS FOR THE STATE OF WISCONSIN'S PARTICIPATION IN THE UCR PROGRAM ARE ALL DISCUSSED IN THE FIRST SECTION. AN INTERPRETATION OF THE DATA IS PROVIDED IN THE SECOND SECTION FOR THE READER WHO IS INTERESTED IN AN ANALYSIS OF WISCONSIN CRIME AND ARREST INFORMATION. THE EXTENT AND NATURE OF WISCONSIN'S REPORTED CRIME IS DELINEATED. CRIME INDEX OFFENSE TRENDS, CLEARANCES, ADULT AND JUVENILE ARRESTS AND LAW ENFORCEMENT PERSONNEL DATA ARE ALSO DISCUSSED IN THIS PORTION OF THE REPORT. THE SECTION IS DIVIDED INTO FOUR PARTS: STATE LEVEL INFORMATION, POPULATION GROUP LEVEL INFORMATION, ADMINISTRATIVE DISTRICT LEVEL INFORMATION AND COUNTY LEVEL INFORMATION. THE REFERENCE TABLES PROVIDE THE READER WITH SPECIFIC INFORMATION ON THE VOLUME, RATE AND MONTHLY TREND OF CRIME INDEX OFFENSES, ARRESTS FOR PART I OFFENSES AND ARRESTS FOR PART II OFFENSES. ALSO INCLUDED IN THE REFERENCE TABLES ARE DATA REGARDING CLEARANCES, JUVENILE INVOLVEMENT IN CLEARANCES, PROPERTY LOSSES AND CHARGES AND DISPOSITIONS FOR PART I AND PART II OFFENSES. ARREST INFORMATION IS BROKEN DOWN BY AGE, SEX AND RACE FOR TOTAL, CITY, SUBURBAN AND RURAL PART I AND PART II ARRESTS. ADULT AND JUVENILE ARREST TABLES ARE SHOWN. FINALLY, LAW ENFORCEMENT MANAGEMENT DATA, INCLUDING ASSAULTS ON OFFICERS INFORMATION, ARE PRESENTED IN THE REFERENCE TABLES. (AUTHOR ABSTRACT)