The family of a dead airman, Ben Carson, who was killed in the 2010 Anzac Day Iroquois helicopter crash, says a report on why information was withheld from them does not answer any questions.
His father, Andrew Carson, says the Air Force excluded his family from meetings and updates on the investigation following the crash, which also killed two others.
It also failed to notify the family of his son's death.
As a result of his complaints, the Air Force commissioned a review by Wellington lawyer Matthew McClelland and those findings have been released.
Mr Carson said the report states the family was not told about the meetings because they were gatherings with the other families and because the Carsons lived too far away.
