In any good whodunnit, the search for the smoking gun becomes the focal point.

Former Garda commissioner Nóirín O’Sullivan has told the Charleton Tribunal she “did not feel comfortable” in the presence of former garda press officer Superintendent David Taylor, and at “times he appeared to be a divisive individual”.

No public inquiry reaching into the dark recesses of Irish life is complete without a shady figure stepping into the light to seek redemption. So it went in the Planning Tribunal. So it goes now with the Disclosures Tribunal.

The Disclosures Tribunal was told yesterday that Supt Dave Taylor is following proceedings on Twitter. #Hello Dave.

These are strange days indeed for An Garda Síochána, and things got a little stranger yesterday in Dublin Castle.

Twelve of fifteen mobile phones belonging to senior garda officers are missing and cannot be provided to the Charleton Tribunal.

The former chief executive of the Road Safety Authority was told by the then Garda press officer Superintendent David Taylor that his phone could be monitored, the Charleton Tribunal has heard.

An apparent “chasm” has opened up between two garda whistleblowers whose allegations led to the setting up of a tribunal into an alleged campaign by senior officers to smear one of them.

Sgt Maurice McCabe has said he was “1,000%” certain he was told that former Garda commissioner Martin Callinan had sent “hundreds of texts” to his then press officer to smear him with false child sex abuse claims.

The former head of the Garda press office has denied telling a whistleblower of an alleged smear campaign involving senior officers.

Latest: Garda whistleblower Sgt Maurice McCabe has testified that former Garda Commissioner Martin Callinan was "obsessed" with him and told the former Garda press secretary to “bury” him, writes Gerard Cunningham.

As Maurice McCabe enters the witness box at the Disclosures Tribunal, will another series of errors be given as explanation for him appearing to be under attack, asks Michael Clifford

Recent events would make you think the interests of Nóirín O’Sullivan are the same as those of An Garda Síochána. It is crucial we make it clear that they’re not, writes Michael Clifford.

Wholly contradictory statements about the alleged smear campaign against whistleblowers must be clarified immediately if the Garda Commissioner is to retain any credibility, writes Political Editor Daniel McConnell