Police in Spain are understood to be looking for a British man, who lives locally, after a Dublin man was shot dead yesterday on the Costa del Sol.
Watch an extended interview with Mr O'Neill's mother
John O'Neill's family said he was an innocent man with no criminal record.
The 40-year-old father-of-two from Coolock was on holiday in Spain with his family when he was shot outside a bar in Benalmadena.
It is understood he had been involved in a row there earlier.
Another man was thrown out of the bar by staff following the row and it is understood he returned with a gun and opened fire -fatally wounding Mr O'Neill.
Mr O'Neill's partner was with him in the bar but was uninjured.
Police are continuing their search for the gunman and are said to be following a definite line of inquiry.
There is no indication that the killing is linked to recent gang-style attacks in the area.
