Matthew Caruana Galizia was at home in Malta working at his laptop on the morning of October 16, 2017, when he heard the explosion that killed his mother, investigative journalist Daphne Caruana Galizia. Daphne Caruana Galizia had spent years reporting on government corruption. She had a phone call and left the house,” Matthew Caruana Galizia testified. "Soon after she left the house, I heard an extremely loud explosion," Matthew Caruana Galizia testified. He told me it was useless," Matthew Caruana Galizia testified.