The former Cleveland Police Authority Chairman, David McLuckie, told reporters outside Newcastle Crown Court that he was "delighted" to be cleared of intimidating a witness.
Earlier this year the 52-year-old local councillor was jailed for eight months for persuading a friend to accept his speeding points, to protect his career.
He is still on police bail in relation to another investigation, called Operation Sacristy.
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The company that own Harden Quarry has confirmed the death of one of their contractors at a site in Northumberland.
Later a candlelit vigil is due to be held at St Andrew's Roman Catholic Church in Eston for those who have lost their jobs.
Cleveland Police are calling on parents to educate their children about the dangers of throwing objects from bridges onto roads.