The data shows that all of the released offenders in Willowbrook were men. The median age of the parolees was 37. The youngest parolee was a 26-year-old man sentenced in 2017 and the oldest was a 51-year-old man sentenced in 1998.
The offender who had been incarcerated the longest was Jamie Munson. He was convicted in 1998 when he was 29 years old. He is now 51.
Under state law, paroled offenders are still in legal custody of the IDOC, meaning they can be taken back to a correctional center at any time if the state has probable cause or a warrant.
The table below shows the 50 cities in Illinois with the most paroled offenders in 2019.
| City | Counties | Total 2019 Parolees | % convicted for sex crimes | % convicted for homicide | % convicted for drug-related crimes |
|---|---|---|---|---|---|
| Chicago | Cook | 6,034 | 1% | 2.6% | 25.4% |
| Rockford | Winnebago | 556 | 1.8% | 1.4% | 18.7% |
| Kankakee | Kankakee | 363 | 9.9% | 4.1% | 24% |
| Peoria | Peoria | 357 | 1.1% | 1.4% | 28.9% |
| Decatur | Macon | 325 | 1.9% | 1.2% | 20.3% |
| Springfield | Sangamon | 313 | 1.6% | 3.2% | 26.5% |
| Joliet | Will | 310 | 1.9% | 1.9% | 23.6% |
| East Saint Louis | St. Clair | 180 | 3.3% | 5.6% | 21.1% |
| Danville | Vermilion | 163 | 5.5% | 1.2% | 30.7% |
| Waukegan | Lake | 162 | 0.6% | 4.3% | 16.1% |
| Aurora | DuPage, Kane, Will | 154 | 0.7% | 4.6% | 25.3% |
| Bloomington | McLean | 133 | 4.5% | 0% | 35.3% |
| Chicago Heights | Cook | 130 | 3.1% | 6.2% | 20.8% |
| Harvey | Cook | 129 | 0% | 3.1% | 10.9% |
| Champaign | Champaign | 128 | 1.6% | 3.1% | 21.1% |
| Calumet City | Cook | 113 | 0% | 8% | 19.5% |
| Blue Island | Cook | 106 | 0% | 0% | 19.8% |
| Elgin | Kane, Cook | 104 | 0% | 2.9% | 26% |
| Quincy | Adams | 102 | 1% | 1% | 43.1% |
| Cicero | Cook | 96 | 2.1% | 2.1% | 19.8% |
| Riverdale | Cook | 95 | 1.1% | 2.1% | 14.7% |
| Dolton | Cook | 91 | 1.1% | 2.2% | 9.9% |
| Maywood | Cook | 87 | 1.2% | 2.3% | 28.7% |
| Urbana | Champaign | 83 | 1.2% | 2.4% | 28.9% |
| Granite City | Madison | 81 | 2.5% | 6.2% | 22.2% |
| Alton | Madison | 75 | 2.7% | 0% | 36% |
| Freeport | Stephenson | 75 | 2.7% | 1.3% | 17.3% |
| Broadview | Cook | 74 | 17.6% | 2.7% | 18.9% |
| Pekin | Tazewell | 72 | 1.4% | 0% | 43.1% |
| Belleville | St. Clair | 68 | 2.9% | 0% | 16.2% |
| Galesburg | Knox | 65 | 0% | 1.5% | 26.2% |
| Marion | Williamson | 65 | 0% | 1.5% | 32.3% |
| Berwyn | Cook | 63 | 1.6% | 3.2% | 19.1% |
| Mount Vernon | Jefferson | 62 | 6.5% | 1.6% | 35.5% |
| Rock Island | Rock Island | 61 | 0% | 4.9% | 42.6% |
| Bellwood | Cook | 54 | 3.7% | 7.4% | 24.1% |
| Centralia | Marion | 52 | 1.9% | 0% | 23.1% |
| Lansing | Cook | 51 | 0% | 2% | 17.7% |
| Zion | Lake | 49 | 2% | 0% | 22.5% |
| Bolingbrook | Will | 46 | 0% | 2.2% | 30.4% |
| Charleston | Coles | 45 | 0% | 0% | 53.3% |
| Ottawa | LaSalle | 45 | 2.2% | 2.2% | 37.8% |
| North Chicago | Lake | 44 | 6.8% | 4.6% | 13.6% |
| Jacksonville | Morgan | 43 | 0% | 2.3% | 58.1% |
| Lincoln | Logan | 43 | 4.7% | 0% | 32.6% |
| Round Lake | Lake | 43 | 0% | 0% | 27.9% |
| Hazel Crest | Cook | 42 | 4.8% | 7.1% | 9.5% |
| South Holland | Cook | 42 | 0% | 7.1% | 21.4% |
| Wheaton | DuPage | 42 | 2.4% | 0% | 19.1% |
| Collinsville | Madison | 41 | 0% | 0% | 19.5% |
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