This 2001 annual report was produced by the Wisconsin Office of Justice Assistance, Statistical Analysis Center (SAC) with over 370 law enforcement agencies throughout the State providing monthly crime and arrest data to Wisconsin’s SAC. The report presents information on statewide index offenses and arrests, arrest summary for selected non-index offenses, statewide arrests by sex and race, summary of offense and arrest trends for 1990-2001, law enforcement officers killed and assaulted, index offenses and property loss by county and law enforcement agency for 2001, arrests by county and law enforcement agency for 2001, and law enforcement employees by county and agency for 2001. Report highlights on crime and arrest in 2001 include: (1) on average, one index crime was reported every 2 minutes, 56 seconds; (2) a total of 415,406 arrests were made in 2001, an increase of 2.7 percent from 2000; (3) overall, 25.2 percent of the index crimes were cleared; (4) Violent Index Crime decreased by 4.2 percent; (5) handguns were involved in 44.4 percent of 2001 murders; (6) forcible rape decreased by 1.4 percent from 2000; (7) theft increased by 4.6 percent; (8) there were 624 assaults on law enforcement officers, 23.8 percent less than in 2000; (9) there were 62 hate crimes reported; and (10) around 62 percent of all murder offenders were between 17 and 24 years of age. Appendices include supplementary information: a glossary, use of Uniformed Crime Reporting (UCR) statistics by local agencies, hate crime, and arrest trends for 1990-2001. Tables, charts, and graphs