There is a misunderstanding: Daphne Caruana Galizia was the leading journalist on the Panama Papers in Malta.

The main source for the PP revelations was the Süddeutsche Zeitung (same guys as this time) and lot of other people were involved all over the world; Caruana Galizia was only one of them, not "the" person.

As far as I know, no reporter from the SZ, the Guardian and other ICIJ members was harmed after the PP revelations. Malta is a very shady place, very close to Southern Italy for political culture.