By Lucy Thornton & Lucy Thornton A woman who helped expose the Shannon Matthews plot has described the kidnapper’s death as “karma”. Julie Bushby of Dewsbury, west Yorkshire, was chair of the Moorside tenants and residents association at the time of Shannon’s abduction. The 54-year-old court worker helped search for the youngster and eventually – along with fellow neighbour Natalie Brown – persuaded shamed mum Karen to confess. It emerged today Mick Donavon, a loner who snatched nine-year-old Shannon in a fake kidnap plot planned by her mum has reportedly died. The 54-year-old held the terrifi…