Who's who in the garda whistleblower controversy
Superintendent David Taylor: The garda officer whose allegations of a smear campaign against a whistleblower have rocked the force and prompted the Government to launch a formal inquiry. Supt Taylor made the allegations in a protected disclosure last Friday.
Sergeant Maurice McCabe: The State's most high-profile garda whistleblower, pictured above, who it is alleged was subjected to the smear campaign and character assassination by senior Garda management.
Commissioner Nóirín O'Sullivan: The State's most senior garda, who is at the centre of this latest whistleblower controversy.
It is alleged that Commissioner O'Sullivan knew about the smear campaign - claims she has denied.
Former Commissioner Martin Callinan: The ex-head of An Garda Síochána, pictured below, who resigned in 2014. It is alleged that he was part of directing the smear campaign.
Justice Iarfhlaith O'Neill: The retired judge appointed to lead the inquiry.
Justice Minister Frances Fitzgerald: Ms Fitzgerald yesterday ordered the inquiry following consultations with the Attorney General.