The self-confessed middleman in the murder of a journalist told a court on Wednesday a wealthy Maltese businessman was the brains behind the killing but said people tied to government might also be implicated.

Melvin Theuma received immunity from prosecution last week for information that would lead to the conviction of alleged plot leader and multimillionaire entrepreneur Yorgen Fenech.

Fenech has been charged with complicity over the 2017 murder of anti-corruption journalist Daphne Caruana Galizia by a car bomb. He has denied the accusations and blamed former government chief of staff Keith Schembri and other senior officials.