GARDAI believe the same hitman who murdered a young man in a case of mistaken identity last August also shot dead a Lithuanian crimelord on May 1 last year.
Sources say that the net is closing in on the ruthless killer who is also linked to at least two other gangland murders.
A file on his involvement in the murder of Lithuanian Gintaras Zelvys (43) has been sent by gardai to the DPP and a decision on the case is expected in the next few weeks.
This development comes as it has also emerged that the ruthless west Dublin criminal also shot mistaken identity victim Dean Johnson (21) at Harelawn Green, Clondalkin, on August 24 last.
A source said: "This criminal is a truly evil individual who has been operating as a hitman for hire for a number of years now.
"He is very well organised but he is also extremely paranoid. But has every reason to be because there are a lot of criminals out to get him again. He would kill anyone if the price was right for him.
"Apart from being involved in these two murders, he is also the chief suspect in the fatal shooting of Richie McCormack in Ronanstown in 2008."
Last August, Dean Johnson was shot instead of the intended target – a major west Dublin criminal who is suspected of at least two gangland murders, who Johnson had been socialising with earlier on the night.
He was shot twice in the body in the Harelawn area of Clondalkin, Dublin, and slumped to the ground.
The gunman then ran toward him and shot him repeatedly in the head. Gardai said that that the victim was hit at least six times, while more than 10 shots were fired. The shooting took place near a pub at Harelawn Green at 12.20am on Saturday, August 24.
And while that murder happened in the dark of night, Johnson's suspected killer was not concerned that it was daylight when he murdered Gintaras Zelvys at a business park in Rathcoole last May.
Unlike Johnson, Zelvys had "known form' for kidnapping, hijacking, extortion, burglary, and extreme violence including rape and other offences.
At an adjourned inquest into Zelvys' death in August, it emerged that he died from gunshot wounds to the trunk
He was killed as he arrived with his wife, Edita, to his "cash-for-clothes" business at the Rathcoole industrial estate.
The Herald previously revealed that Zelvys was shot dead because he ripped off a major Irish drugs trafficker based in Amsterdam of €800,000 worth of drugs and that the hit-team divided up a bounty of €50,000 after the clinical daylight gangland gun murder.