Fighters of the Islamic State stand guard at a checkpoint in the Northern Iraq City of Mosul
Fighters of the Islamic State of Iraq and the Levant (ISIL) stand guard at a checkpoint in the northern Iraq city of Mosul, June 11, 2014. Picture taken June 11, 2014. REUTERS/Robert Stringer

Images of jihadists tweeting their photos holding decapitated heads are good leads who are the key leaders of the Islamic State of Iraq and the Levant (ISIL). One of them who tweeted in early August that kind of photo helped British intelligence agencies find the true identity of jihadist John, who beheaded American photojournalist James Foley.

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On Sunday, M15 and M16 identified British rapper Abdel-Majed Abdel Bary as the beheader of Foley.

Another jihadist from Australia made a similar tweet a few days ahead of Bary, showing his son holding the decapitated head of a Syrian soldier also. Khaled Sharrouf, now in Syria, also have videos - not MTVs like Abdel Bary who is a rapper - but more gory ones as he is shown executing unarmed detainees, reported The Sydney Morning Herald.

The daily also uncovered a lot of things about Sharrouf, which could possibly also help Australian authorities capture him in the future.

One of them is Sharrouf and other criminals fought over a $9 million debt preceded by his departure for the Middle East to join ISIL's jihad. His ties with the criminal world goes a long way back as he worked with bikies, drug dealers and other underworld characters as a "muscle for hire."

Because of his dealings and clashes, law enforcement agencies believe Sharrouf's hasty departure using his brother's passport could have been triggered both by his desire to fight for the ISIL and to flee threats to his life.

The SMH article also revealed that Sharrouf used to work with George Alex, who is involved in Sydney's building industry. Besides Sharrouf, his closest relatives were also employed by Alex.

As part of his job, Sharrouf was tasked to collect $9 million disputed debt that a building company claimed Meriton, a property developer, owed it. But besides Sharrouf, another Sydney group was claiming to have prior right to the $9 million debt of Meriton.

In one of their confrontations, Sharrouf allegedly fired a shotgun, which resulted in subsequent retaliation by the rival group that killed Sharrouf's business partner, prompting him to flee the house purchase by his boss for him and his family.

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