GARDAI have identified the gangster who wore a white Scream mask during the callous shooting of a drug dealer in a packed city pub.
Detectives have arrested the man they believe acted as a lookout when Alan McNally was shot dead the Cappagh Nua pub in Finglas, North Dublin, on February 2.
Sources say the Scream mask suspect is a brother of the criminal who set-up McNally's murder -- the first gangland slaying of 2012.
After being arrested, he was questioned for two days at Finglas Garda Station before being released without charge.
A sister and a niece of the man who ordered the hit have also been arrested.
Detectives made a major breakthrough in the case when they obtained CCTV linking relatives of the chief suspect to the crime scene.
The Herald previously revealed McNally was murdered on the order of a thug who himself survived an assassination attempt in December 2010.
McNally (36), from Cappagh Avenue, Finglas, had been warned by gardai that his life was under threat after rowing with criminal elements in Finglas and Coolock.
He had been warned by gardai to be inconspicuous as they feared there was an imminent danger to his life.
However, sources say he ignored gardai and publicly boasted about getting revenge for the death of his brother, who was shot dead by slain crimelord Eamon 'The Don' Dunne's gang in January 2009.
Alan was in jail when his older brother had a major falling out with his former close associate Dunne who had suspected that he was trying to murder him.
Alan was released in October having served five and a half years for having €200,000 worth of heroin.
Sources say he made himself an easy target for a gunman by drinking in the same pub for 14 hours.
Detectives investigating McNally's cold-blooded shooting believe the chief suspect also killed his brother in February, 2009.
Officers are also satisfied that the gun-for-hire carried out the pub murder of Paul 'Farmer' Martin almost four years ago. At a press conference last month, Detective Inspector Kieran McEneaney said: "This murder was particularly brutal, it was clinical. It was your typical gangland murder."
"The gunman had no regard for entering into a licensed premises with other occupants in it and firing a number of shots and killing Alan McNally," McEneaney said.
"It would be fair to say that we know the gang members that were involved in this particular killing. Up to four persons were in this gang."