In video the Daily Chronicle obtained through a Freedom of Information Act request, Sycamore Police stop Elgin Police Sgt. Mark Whaley on a suspicion of driving under the influence in an early morning stop on April 8.
Whaley later was released without even a traffic ticket because of lack of evidence, according to the police report.
Police Chief Glenn Theriault has been on administrative leave since April 10 as the city investigates why an Elgin police officer arrested on suspicion of driving under the influence was released without charges.
The video is edited from its original version for time.