Gardaí didn't find 'act of omission' that worried detective in Regency Hotel shooting probe, inquest told

The murder of David Byrne — a senior figure in the Kinahan crime cartel — during a daring attack on a boxing weigh-in at the hotel sparked a deadly gangland feud between the rival groups.

Detective Superintendent Colm Fox (pictured) was the lead investigator into the fatal shooting of David Byrne at the Regency Hotel in Whitehall, Dublin on February 5, 2016, by members of the Hutch crime gang. File picture: Collins

Gardaí have been unable to establish an “act of omission” that had been referenced repeatedly by a senior detective overseeing a high-profile murder investigation who took his own life in a garda station in Dublin over six years ago.

Detective Superintendent James Tierney, who investigated the circumstances of the death of Detective Superintendent Colm Fox in Ballymun garda station on February 10, 2018, told a sitting of Dublin District Coroner’s Court that it had not been possible to determine what the omission might have been.