Police supervisor demoted after Iowa road rage incident

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IOWA CITY, Iowa (AP) - An Iowa police supervisor with a history of misconduct has been demoted but not fired after an off-duty road rage incident in which he grabbed a motorist by the neck.

Waterloo Police Chief Daniel Trelka wrote in the decision that he could have terminated Lt. Corbin Payne for lapses in "judgment, discipline, professionalism, and integrity" and noted that Payne was previously suspended for assaulting a juvenile detainee in a similar fashion.

Trelka revealed that Payne improperly used police databases to research the motorist. But he ultimately demoted Payne to officer, citing his 21-year career while acknowledging Payne's service exposes the city to liability for "negligent retention."

Payne's union is appealing the demotion, which came after jurors in January acquitted Payne of assault causing bodily injury in the June 2016 altercation.