It is now four years since the assassination of journalist Daphne Caruana Galizia in Malta, but despite progress in bringing her killers to justice, her son and free speech campaigners warn it could still happen again.

Malta, a small island in the Mediterranean Sea sitting off the south coast of Sicily and an EU member state, was thrust into the spotlight when Caruana Galizia was killed by a car bomb on 16 October 2017.

Once described as a “one-woman Wikileaks“, the 53-year-old ran a defiant and hard-hitting blog in English (it’s still online) targeting politicians and big business, which at times drew more readers than all of Malta’s newspapers combined.