Yira Graciano-Toala, 52, was arrested on Friday.
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According to investigators, Graciano-Toala was driving the 2011 Cadillac SRX that dragged the trooper about a tenth of a mile down Farrand Drive in Mill Creek on Monday afternoon.
Authorities tell Action News the trooper was directing traffic due to malfunctioning traffic lights.
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The trooper, who is an 18-year veteran of the force, sustained non-life-threatening injuries.
Graciano-Toala was arraigned and released on $15,600 bail.