ChicagoPoliceScanner.com keeps viewers informed about the neighborhoods, criminal activity and police operations by helping viewers locate public law enforcement radio communications that are available.
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Outline type of law enforcement operating in Chicagoland
Federal
ATF
DHS
FBI
TSA
US Marshal
State
Illinois State Police
Secretary of State
County Sheriff
Cook County Sheriff
Cook County Forest Preserve
DuPage County Sheriff
Lake County Sheriff
McHenry County Sheriff
Cities and Villages
Park District Police
Metropolitan Enforcement Groups
Task Forces
Detail
Mutual Aid
ILEAS
NIPAS
MCAT -- Major Case Assistance Team
Metra Police
Metropolitan Water Reclamation District