Man regrets role in pub killing

A man involved in the killing of a father-of-three in Grumpy Jack's pub in Dublin has told a trial it was the worst mistake of his life.

Joey O'Brien is the key witness against Peter Kenny of McCarthy’s Terrace, Rialto, Christopher Zambra of Galtymore Road, Drimnagh, Damien Johnston of Cashel Avenue, Crumlin and Bernard Hempenstall from Park Terrace in The Coombe, who all deny murdering John Carroll, who was gunned down in on February 18, 2009.