VALLETTA, Malta (AP) -- A Dutch forensic team arrived in Malta on Tuesday to help investigate the car bomb slaying of a journalist who scrutinized the country's top politicians and other powerful figures, an official said, as angry Maltese demanded the truth about who killed the anti-corruption crusader.
Maltese Home Minister Michael Farrugia said FBI agents also would be sent to the Mediterranean island in the coming days to assist police in Monday's killing of Daphne Caruana Galizia, 53, who exposed Maltese links to offshore tax havens through the Panama Paper leaks.
"My mother was assassinated because she stood between the rule of law and those who sought to violate it, like many strong journalists," one of three sons, Matthew Caruana Galizia, wrote on Facebook.
"But she was also targeted because she was the only person doing so. This is what happens when the institutions of the state are incapacitated," he wrote.
It was unclear who might have engineered the bombing. Her car exploded, spinning in the air and landing as a fiery hulk in a field, right after she left her home Monday afternoon.
"I am never going to forget, running around the inferno in the field, trying to figure out a way to open the door, the horn of the car still blaring, screaming at two policemen who showed up with a single fire extinguisher to use it," Matthew Caruana wrote.
"They stared at me. 'I'm sorry, there is nothing we can do,' one of them said. I looked down and there were my mother's body parts all around me," he recounted.
Italian RAI state TV, without citing sources, said the explosives were believed to have originated from abroad.
One of the topics Caruana Galizia probed grew out of revelations from the 2016 Panama Papers leak. She wrote that the wife of Prime Minister Joseph Muscat, the country's energy minister and the government's chief of staff had offshore holdings in Panama to receive money from Azerbaijan.
The Muscats denied they had companies in Panama. The energy minister and chief of staff denied that the Panama companies were opened to receive money from Azerbaijan and filed libel suits against the journalist.
Speaking to Italian state television Tuesday, the prime minister noted that Caruana Galizia had written about him for years.
The slain journalists wrote "some things that were true, some that weren't. This was a total invention," Muscat said, referring to the Panama Papers leaks.
Ordinary Maltese, many of whom made Daphne Caruana Galizia's blog, Running Commentary, the first thing they read daily on the 400,000-population island nation, were shocked and angered.
Outside Malta's Law Courts, about 200 people held an hour-long sit-in to call for justice for the slain journalist in the capital, Valletta. Graffiti quoting the last words she wrote — "There are crooks everywhere you look" — were written on one of Malta's major roads Tuesday.
In posts to online newspaper coverage, Maltese expressed hope her death could be a turning point in a national narrative they see as riddled with corruption.
A tax haven, Malta's financial institutions have a reputation as a convenient place in the middle of the Mediterranean to move questionably earned money or to avoid taxes.
Matthew Caruana Galizia, also an investigative journalist who was part of a Pulitzer Prize-winning consortium of journalists that covered the Panama Papers leaks, contended that a "culture of impunity has been allowed to flourish by the government of Malta."
"If the institutions were already working, there would be no assassination to investigate — and my brothers and I would still have a mother," he wrote.
On the European mainland, several EU lawmakers echoed similar concerns.
EU parliamentarian Sven Giegold, a spokesman for the Greens in the European Parliament's Committee of Inquiry on money laundering and tax evasion, demanded that the EU scrutinize Malta.
"The murder of a courageous journalist who has been fighting with corrupt elites in her country must lead to a European outcry," Giegold said. In a statement, the lawmaker described Malta as a "mecca for money launderers and tax avoiders."
Muscat said during in his Italian TV that Malta's financial system was "very transparent, very sound." The prime minister said the country follows the "same rules as those approved by the European Commission."
In Italy, a senator from the populist 5-Star Movement, Mario Michele Giarrusso, noted that the Italian Parliament's anti-Mafia commission was coming on a money-laundering fact-finding visit to Malta on Oct. 23-24, a previously scheduled mission.
The car bomb, Giarrusso contended, was meant to "shut Daphne Caruana Galizia's mouth" before the commission arrived.
Malta is experiencing an exponential expansion in online gaming businesses as well as financial services businesses.
Italian prosecutors who specialize in organized crime investigations have been warning for years that Italy's powerful crime syndicates are increasingly laundering illicit revenues through the financial services sector. They have also said the Naples-area Camorra syndicate has heavily infiltrated online gaming in Italy and beyond.
Italy's national organized crime prosecutor, Franco Roberti, told reporters in Milan that the Maltese slaying reminded him of the 2006 killing of Russian journalist Anna Politkovskaja. Noting Malta was an EU member, Roberti said it was imperative that the truth come out.
"Europe can't tolerate that a journalist who denounces corruption is killed," Italian news agency ANSA quoted Roberti as saying.
Frances D'Emilio reported from Rome. Lorne Cooke and Raf Casert in Brussels contributed to this report.