The office of the Taoiseach has remained quiet over Enda Kenny's encounter with murder-accused Dave Mahon earlier this week.
The pair met at the service of remembrance for the victims of the Berkeley tragedy last week, in which six Irish students lost their lives.
Other members of the Oireachtas including Tanaiste Joan Burton, Minister James Reilly, TD Mary Mitchell O'Connor as well as the US Ambassador Kevin O'Malley, attended the service at St Ann's Church on Dublin's Dawson Street.
Mr Mahon is awaiting trial accused of killing his partner's 23-year-old son Dean Fitzpatrick.
He was in the company of his partner Audrey Fitzpatrick, whom he married in a ceremony in Spain last month, as he talked with the Taosieach.
Despite their encounter being described as "spontaneous" and not pre-scheduled, the Taoiseach's office failed to comment when asked about the meeting between the pair.
The Taoiseach is currently in Brussels attending an EU summit.
When contacted by the Herald, Mr Mahon said he did not wish to comment on the discussion with Enda Kenny, only saying that he wanted to keep out of the public eye until his court case was complete.
Mr Mahon is charged with murdering Dean Fitzpatrick on May 26 2013 at Northern Cross on Dublin's Malahide Road.
His trial is due to commence April 25.
Audrey is the mother of Amy Fitzpatrick who disappeared without a trace from the Costa del Sol in Spain in 2008.
Audrey has vowed to never give up searching for her daughter who was 15-years-old when she went missing.