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Owen Thomas McKenna, 40, is believed to have been shopping when debris fell on his car.
The father-of-two moved to New Zealand from Ireland about six years before the earthquake. His death was confirmed by police on March 6, 2011.
Owen was a psychiatric nurse and was married to a New Zealand woman.
It is understood his wife Sarah and children Grace and Tadgh were visiting family in another part of the country when the earthquake struck.