The Wenatchee World reports Chief Greg Meinzer wanted to fire Officer David Andersen over the incident last November but agreed to the suspension.
Andersen denied lying. The Grant County prosecutor said there wasn't enough evidence for a charge of official misconduct.
Information about the suspension was obtained by the Wenatchee newspaper through a public records request.
Andersen said reasons for stopping the car including having the license obscured by a trailer hitch and a passenger not wearing a seat belt. Investigators said the license plate was not obstructed and tinted windows made it difficult to see a passenger.
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