Matthew Caruana Galizia said his mother was working on "possibly her biggest" story before she was killed in a car bomb last October.
More stories from the Daphne Project will be covered by Times of Malta this week.
The Daphne Project is a collaboration by more than 18 international media organisations dedicated to continuing the work of Ms Caruana Galizia.
They include The New York Times, The Guardian, La Repubblica, Le Monde, Süddeutsche Zeitung and Times of Malta.
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