Gerry Hutch's defence team want to know if gardaí used tracker device illegally

Mr Justice Burns said: "We have had a lightning bolt from Mr Grehan today in relation to what might be at play.

A member of the Garda Armed Support Unit provides added security during the Gerry Hutch trial. File photo: Collins Courts

Gerard Hutch’s defence team have told his Special Criminal Court murder trial that it is “of great significance” whether gardaí deployed a tracker device on a jeep belonging to former Sinn Féin councillor Jonathan Dowdall and illegally used it while the vehicle was in Northern Ireland.

Gerard 'The Monk' Hutch (59), last of The Paddocks, Clontarf, Dublin 3, denies the murder of Kinahan Cartel member David Byrne (33) during a boxing weigh-in at the Regency Hotel on February 5, 2016.