Iowa Clearance Percentages for Major Crimes by County (2006)

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County Murder Rape Robbery Assault Burglary Larceny Vehicle
Theft
All
Adair
nr nr nr 54% 0%(a) 0%(c) 0%(a) 14%
Adams
nr 0%(a) nr 75% 0%(a) 0%(c) 40% 11%
Allamakee
nr nr nr nr nr nr nr nr
Appanoose
nr 0%(a) 50% 59% 15% 10% 18% 23%
Audubon
nr nr nr 54% 33% 8% 0%(a) 19%
Benton
nr 0%(a) 100% 77% 12% 14% 0%(a) 33%
Black Hawk
100% 27% 33% 58% 11% 19% 18% 28%
Boone
nr 39% nr 35% 11% 10% 24% 22%
Bremer
0%(a) 33% nr 72% 15% 13% 14% 36%
Buchanan
nr nr 50% 48% 13% 12% 56% 26%
Buena Vista
100% 50% 33% 61% 11% 16% 52% 35%
Butler
100% 0%(a) nr 87% 27% 6% 50% 47%
Calhoun
100% 0%(a) nr 67% 13% 2% 25% 23%
Carroll
nr 0%(a) nr 64% 18% 27% 17% 35%
Cass
nr 100% 0%(a) 65% 10% 22% 8% 27%
Cedar
nr 60% 0%(a) 81% 17% 16% 21% 40%
Cerro Gordo
100% 8% 86% 71% 7% 28% 13% 34%
Cherokee
nr nr nr 91% 21% 24% 25% 52%
Chickasaw
0%(a) 50% nr 25% 3% 5% 0%(a) 10%
Clarke
nr 0%(a) nr 60% 16% 8% 8% 21%
Clay
nr nr nr 51% 5% 16% 17% 26%
Clayton
0%(a) 0%(a) nr 15% 0%(c) 2% 0%(a) 5%
Clinton
100% 0%(b) 32% 49% 10% 16% 18% 24%
Crawford
nr nr nr 92% 9% 36% 38% 48%
Dallas
nr 0%(a) 50% 66% 7% 13% 20% 28%
Davis
nr 100% nr 80% 60% 39% 100% 66%
Decatur
nr 100% nr 38% 0%(a) 10% 50% 28%
Delaware
nr nr nr 96% 47% 32% 67% 61%
Des Moines
0%(a) 22% 38% 70% 7% 24% 22% 33%
Dickinson
nr 100% nr 77% 31% 19% 0%(a) 34%
Dubuque
nr 13% 25% 39% 4% 13% 14% 21%
Emmet
100% 33% nr 27% 14% 2% 0%(a) 15%
Fayette
nr 13% 0%(a) 33% 3% 2% 40% 12%
Floyd
nr nr 0%(a) 73% 13% 18% 29% 35%
Franklin
nr nr nr 95% 60% 29% 50% 65%
Fremont
nr nr nr nr nr nr nr nr
Greene
nr nr nr 73% nr 13% 0%(a) 35%
Grundy
100% nr nr 68% 18% 33% 100% 44%
Guthrie
nr nr nr nr 0%(c) 0% 0%(a) 0%
Hamilton
nr 20% nr 76% 15% 13% 8% 31%
Hancock
nr nr nr 71% 35% 14% 25% 35%
Hardin
nr 40% nr 74% 15% 15% 20% 30%
Harrison
nr 0%(a) 0%(a) 34% 0% 9% 25% 15%
Henry
nr 0%(a) 100% 92% 21% 21% 36% 37%
Howard
nr nr 100% 91% 16% 14% 47% 29%
Humboldt
nr nr nr 94% 3% 19% 43% 29%
Ida
nr nr nr 69% 14% 15% 33% 37%
Iowa
nr nr nr 64% 23% 11% 20% 27%
Jackson
nr 33% nr 60% 30% 20% 29% 37%
Jasper
nr 0%(a) 60% 48% 18% 13% 30% 23%
Jefferson
nr 0%(a) 100% 46% 1% 13% 0%(b) 22%
Johnson
nr 18% 49% 59% 14% 24% 17% 33%
Jones
nr nr nr 54% 17% 15% 20% 30%
Keokuk
nr nr nr 0%(a) 0%(a) 0%(b) nr 0%(b)
Kossuth
nr 50% nr 83% 10% 23% 33% 47%
Lee
nr 40% 50% 81% 16% 17% 26% 34%
Linn
43% 13% 18% 68% 9% 18% 21% 28%
Louisa
100% 50% nr 85% 16% 11% 71% 45%
Lucas
nr 0%(a) 0%(a) 70% 14% 10% 13% 26%
Lyon
nr 75% nr 66% 30% 21% 67% 41%
Madison
nr 0%(a) 0%(a) 49% 22% 13% 25% 25%
Mahaska
nr 38% 75% 69% 23% 20% 35% 41%
Marion
nr 0%(a) nr 74% 12% 11% 6% 28%
Marshall
nr 17% 11% 76% 8% 15% 30% 29%
Mills
nr 50% nr 39% 7% 7% 21% 17%
Mitchell
nr nr nr 75% 23% 20% 43% 31%
Monona
nr nr nr nr nr nr 0%(a) 0%(a)
Monroe
nr 0%(a) nr 56% 10% 8% 0%(a) 19%
Montgomery
100% 100% nr 91% 20% 18% 29% 43%
Muscatine
100% 41% 33% 86% 17% 22% 35% 40%
O’Brien
nr 0%(a) nr 88% 20% 27% 21% 43%
Osceola
nr 100% nr 93% 45% 10% 67% 42%
Page
nr 0%(a) nr 43% 12% 9% 9% 18%
Palo Alto
nr 0%(a) nr 41% 7% 4% 25% 16%
Plymouth
25% 13% 33% 44% 19% 22% 18% 30%
Pocahontas
nr nr nr 80% 32% 17% 33% 38%
Polk
100% 27% 26% 57% 9% 14% 13% 25%
Pottawattamie
75% 27% 20% 59% 6% 15% 7% 20%
Poweshiek
nr 14% 50% 45% 9% 15% 39% 22%
Ringgold
nr nr nr nr nr nr nr nr
Sac
nr nr nr 71% 5% 11% nr 24%
Scott
86% 24% 30% 46% 12% 15% 18% 25%
Shelby
nr nr nr nr nr nr nr nr
Sioux
nr 50% nr 56% 19% 15% 25% 30%
Story
nr 14% 11% 35% 4% 9% 14% 13%
Tama
100% 0%(a) 50% 74% 16% 13% 17% 33%
Taylor
nr nr nr 86% 0%(c) 0%(c) nr 11%
Union
nr 33% 50% 25% 0% 0% 12% 6%
Van Buren
100% 0%(a) nr 68% 0% 13% 0%(a) 24%
Wapello
nr 5% 100% 69% 7% 16% 11% 24%
Warren
0%(a) 8% 0%(a) 49% 11% 11% 23% 24%
Washington
nr 25% nr 57% 19% 8% 0%(a) 30%
Wayne
nr nr nr 100% 0%(a) 0%(b) 0%(a) 41%
Webster
nr 0%(b) 14% 57% 6% 16% 11% 22%
Winnebago
nr nr nr 0%(a) 0%(a) 0%(a) nr 0%(a)
Winneshiek
nr 100% nr 88% 25% 11% 0%(b) 26%
Woodbury
0%(a) 15% 22% 58% 7% 23% 9% 32%
Worth
nr 0%(a) nr 32% 11% 7% 8% 13%
Wright
nr 100% nr 49% 8% 18% 31% 26%

 

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Notes:

a: 1 to 10 reported crimes

b: 11 to 20 reported crimes

c: 21 to 30 reported crimes

d: 31 to 40 reported crimes

nr: no crimes reported

The data set used for this presentation (see below) is consisent with but may differ in part from other data sets provided by the Uniform Crime Reporting Program and used for other presentations in this series.

Clearance Percentage: The percentage of known or reported crimes cleared by arrest. The percentage is determined by dividing the number of arrests for a specific offense by the number of offenses reported to police. Blank cells indicate that no offenses in this category were reported to police. A zero percentage (0%) indicates that none of the reported offenses were cleared by an arrest.

Reported Crimes: The number of known crimes reported to police. The number of these crimes cleared by arrest is represented by the Clearance Percentage, calculated by dividing the number of reported crimes by the number of crimes cleared by an arrest, and is provided in a separate table.

All: Refers to all of the seven major crimes in the table: murder, rape, robbery, assault, burglary, larceny, and vehicle thef (see below)t.

Description of Source Data: “The . . . dataset is a compilation of offenses reported to law enforcement agencies in the United States. Due to the vast number of categoriesof crime committed in the U.S., the FBI has limited the type of crimes includedin this compilationto those crimes which people are most likely to report to police and those crimeswhich occur frequentlyenough to be analyzed across time. Crimes included are criminal homicide, forcible rape, robbery, aggravated assault, burglary, larceny-theft, and motor vehicle theft. Much informationabout these crimes is provided in this dataset. The number oftimes an offense has been reported, the number of reported offenses that havebeen cleared byarrests . . . [are] major items of information collected.” Federal Bureau of Investigation, US Departmentof Justice.

Source: Uniform Crime Reporting Program Data – Offenses Known and Clearances by Arrest

More Information on Source Data