Josh Larkin was charged with weapons offences for possessing a black handgun and producing it in the course of a dispute, at Gateway Crescent outside Ballymun Garda station in the city's north side on Tuesday.

Investigating gardaí have continued to appeal for witnesses.

Detective Superintendent Colm Fox was found dead in his office at Ballymun Garda Station on the evening of February 10th, 2018.