Alan Shatter, the Fine Gael deputy who resigned from the position of Justice Minister in May, will appear on The Late Late Show this evening.

It is believed that Mr Shatter will discuss his resignation from the cabinet, as well as the controversies surrounding Garda whistleblowers and the Garda Síochána Ombudsman Commission (GSOC).

Ahead of Mr Shatter’s appearance tonight on RTÉ, here’s everything you need to know about the GSOC and whistleblower scandals, his reactions to them, and his resignation from the Justice ministry.

(For more in-depth coverage of each event, click on the red links included in the timeline's dates.)

May 15^th, 2013: As allegations of widespread corruption over penalty points being quashed by Gardaí spread, Mr Shatter criticises whistleblowers. An official report is published, ruling out any evidence of criminality in the force.

May 16^th, 2013: While appearing on RTÉ’s Primetime, Mr Shatter divulges that Deputy Mick Wallace avoided penalty points when stopped for using his mobile phone while driving.

September, 2013: A security sweep of GSOC by British security consultants identifies three 'technical anomalies'.

October 2^nd, 2013: In the Dáil, Mr Shatter falsely claims that Garda whistleblowers had not co-operated with an internal Garda inquiry.

December, 2013: GSOC decides to improve security, and to not inform the Justice Minister of the security risks.

February 9^th, 2014: The Sunday Times reports growing concerns amongst GSOC staff that their offices have been bugged.

February 10^th, 2014: Mr Shatter invites Simon O’Brien, the GSOC chairman, to come to his office and explain why the commission elected to not inform him or the Gardaí of potential security risks.

Mr O’Brien issues a statement of regret, and says there is no evidence of Garda misconduct.

February 12^th, 2014: The GSOC chairman tells the Public Service and Oversight Commission that he does actually suspect that GSOC offices were bugged.

February 19^th, 2014: Fianna Fáil leader Micheál Martin releases the transcript of a conversation between Garda whistleblower Maurice McCabe and Oliver Connolly, the appointed first point-of-contact for informants. In the transcript it is alleged that the Justice Minister would ‘go after’ the whistleblowers if their information were ever released to the media.

Alan Shatter sacks Oliver Connolly from his position.

March 12^th, 2014: A report by the Garda Inspectorate finds major failings within the penalty points system, and finds evidence that vindicates the whistleblowers.

March 25^th, 2014: Martin Callinan resigns as Garda Commissioner, while further scandal breaks as the news spreads of the recording of calls into and out of Garda stations dating back to the 1980s.

March 26^th, 2014: Mr Shatter makes an apology to the two Garda whistleblowers, and says he is not guilty of inaction over the phone call recordings in Garda stations.

May 6^th, 2014: The Data Protection Commissioner Billy Hawkes rules against Mr Shatter over his revelations about Deputy Mick Wallace on Primetime a year earlier. The ruling means the Justice Minister is found to have acted illegally.

May 7^th, 2014: Mr Shatter resigns from cabinet, ahead of the publication of the Guerin Report, a 300-page document concerning allegations of misconduct by Gardaí.

May 22^nd, 2014: Still entitled to take severance after resigning his position, Mr Shatter donates his €70,000 lump sum to the Jack & Jill Foundation.

June 19^th, 2014: Mr Shatter addresses the Dáil for the first time since resigning, telling the chamber he was the victim of a “kangaroo court.” He also severely criticises solicitor Seán Guerin, author of the report into allegations of Garda corruption, accusing him of rushing to judgement. 

He also formally appeals against a decision by the Data Protection Commissioner that he unlawfully divulged information about Deputy Mick Wallace on Primetime.

July 30^th, 2014: Mr Shatter launches a High Court challenge to quash certain elements of the Guerin Report, claiming it shows bias and an absence of fair procedures.

September 17^th, 2014: Mr Shatter, speaking in the Dáil, calls for the GSOC chairman to step down from his post, after Mr O’Brien failed to find the source of a leak to The Sunday Times concerning bugging allegations.

September 26^th, 2014: Mr Shatter is scheduled to appear on The Late Late Show, where is it believed he will address a number of the issues that plagued his last year as Justice Minister.