The policy describes detection of plates together with vehicle make, model, color, and unique identifiers.
LOCAL SURVEILLANCE · BOONE COUNTY, ILLINOIS
Boone County
County-level records are kept separate from municipal systems. A camera located inside a city is not automatically counted as a city-owned camera, and Belvidere's municipal inventory is tracked on its own page.
MUNICIPALITIES · OFFICIAL BOUNDARIES
Drill down from Boone County to the municipality.
The map shows incorporated municipal boundaries intersecting Boone County. Cross-county municipalities are clipped to the Boone County outline on this map, but their municipal dossier applies to the municipality as a whole unless a source says otherwise.
Research available Unresearched Crosses county line
Boone County · click a municipal boundary to open its dossier
Belvidere City · Municipal dossier available Caledonia Village · Research needed Capron Village · Research needed Cherry Valley Village · Research needed · also in Winnebago County Loves Park City · Research needed · also in Winnebago County Poplar Grove Village · Research needed Timberlane Village · Research needed
Municipality inventory is cross-checked against Census and Boone County materials. Boundary geometry is loaded from the Illinois DNR municipal/county GIS layers. Census place index · Boone County community data · Illinois DNR municipal boundaries
12 installed · 1 planned
| Jurisdiction | Installed | Planned |
|---|---|---|
| Boone County Sheriff’s Office | 6 | 0 |
| Belvidere Police Department | 6 | 1 |
| Total | 12 | 1 |
INVENTORY · BCSO FOIA RECORDS · BELVIDERE FOIA RECORDS
What the Boone County Sheriff's Office policy says.
The policy states reasonable suspicion or probable cause is not required before using an ALPR system itself during authorized operations; enforcement still requires an independent lawful basis.
Officers are directed to verify alerts and vehicle information rather than treating an ALPR hit alone as sufficient enforcement justification.
The policy states Flock-hosted data is purged after 30 days.
ALPR data downloaded to the county server should be stored no longer than one year, subject to evidence and records-retention requirements.
The Sheriff or designee is to audit ALPR detection-browsing inquiries at least once per calendar year, including a random sample.
The policy describes individual credentials and system use capable of being fully audited.
The policy states data will not be shared by the county or its contractors/subcontractors for federal immigration-enforcement purposes involving specified federal immigration agencies.
PUBLIC RECORDS · FOIA
Records and official sources.
Primary government records are preferred. Where practical, NoRec keeps a local archival copy alongside the official source so citations remain auditable if a government URL later changes.
FOIA release 2026-06-03
BCSO Policy 450 — Automated License Plate Readers (ALPRs)
Policy released in NoRec FOIA request 26-164. Covers authorized use, alert verification, auditing, retention, sharing restrictions, and data captured by the ALPR system.
Archive 2026-06-03
NoRec FOIA request 26-164 — request and response history
Archived request metadata and the public-body response history for the policy release.
FOIA portal
Boone County Sheriff / Belvidere Police FOIA request form
Official Boone County public-safety FOIA form. NoRec links to the government-hosted copy rather than treating the form itself as a surveillance finding.
SUPPORTED / NOT SUPPORTED
What the records support — and what they do not.
- BCSO uses Flock Safety ALPR technology and has its own county inventory separate from Belvidere's municipal inventory.
- The BCSO policy describes capture of more than the plate itself.
- The policy permits ALPR use without requiring reasonable suspicion or probable cause merely to operate/query the system in the authorized context described.
- Alert verification is required before enforcement action.
- Flock-hosted retention is described as 30 days.
- County-side downloaded data can remain up to one year under the policy, with exceptions for evidence/retention obligations.
- Annual browsing audits are required by policy.
- Exact field-confirmed installation matching for every current mapped coordinate.
- That ICE has direct access for immigration enforcement; the supplied policy says the opposite for that purpose.
- That an officer may lawfully stop a vehicle solely because an ALPR alert occurred; the policy requires verification and a lawful basis.
- Which agencies currently receive Boone County ALPR data.
- How many users currently have system access.
- What the annual audits actually found.
FOLLOW-UP
Records still worth obtaining.
- Results of annual audits and any corrective actions.
- Current sharing and authorized-agency lists.
- Detection-browsing usage totals and access-log details.
- Authorized-user counts and training records.
- County retention schedules governing exported ALPR records.
- Current contracts, pricing, renewals, and grants.
- Installation dates and exact device-to-coordinate matching.
- Regional or inter-agency search-access agreements.