There are fears of a new terror campaign in Northern Ireland after a prisoner officer was seriously injured when a bomb exploded under his van.
The incident was a flashback to a troubled past and a warning, say police, about the immediate future.
Police warned there could be more attacks marking the 100th anniversary of the Easter Rising.
ITV News Correspondent Neil Connery reports from Belfast:
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The penalty follows an investigation into a complaint by Whistl, one of Royal Mail’s customers.
Wilson, dressed in the black suit of a cleric, showed no emotion when the decision was announced.
It is the sixth fatality in a matter of weeks.