He also attended a rally for President Connolly during her election campaign.
A Sinn Fein activist arrested as part of an investigation into a plot to attack a mosque was brought to Leinster House by a Laois Senator.
Reports indicate the man was signed into Leinster House on two occassions by Sinn Fein's Maria McCormack.
The party insists he was not a member after they twice rejected his application due to charges of possession of cocaine and cannabis.
However he did attend a party rally addressed by President Catherine Connolly just six weeks ago.
The man was held under the Offences Against the State Act before being released last night without charge.
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