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A 72-year-old woman in Texas has threatened to sue police after an officer "tasered" her with an electronic stun gun.

Deputy constable Chris Bieze stopped Kathryn Winkfein on a Highway, where they had a confrontation over a speeding ticket.

The policeman's superior, Sergeant Major Gary Griffin, said Mrs Winkfein "made a very simple interaction with the police a very difficult task", but Mrs Winkfein denies being argumentative.