GARDAI have traced a mystery caller to the home of stabbing victim John Maguire, around two hours before he was knifed to death.
Officers believed the man might have had information that could help them delve into the former publican's final hours.
They said last night he had now been located and had been eliminated from their inquiries.
Mr Maguire's body was found slumped behind his front door in Smithfield with multiple stab wounds after a neighbour spotted that the door was slightly ajar. Officers renewed their appeal to anybody who had been in contact with Mr Maguire (51) on Monday.
"We are also anxious to talk to any locals, who might have seen a caller at the house, or noticed anybody acting suspiciously in the square or surrounding streets up to around 2.30pm," one officer said.
They have also asked taxi drivers who collected a fare in the Ormond Square area of Dublin's north inner city during the same time-frame to contact the incident room at the Bridewell garda station, phone 01 6668200, or phone the confidential line, 1800 666111.
Officers are also trawling through CCTV footage.