Father-of-three gunned down in front of customers in a Dublin pub was a suspected major drug dealer, it has emerged.Detectives knew John Carroll as an associate of a number of criminal gangs in the capital, particularly the underworld faction in Crumlin.The 33-year-old was killed when a gunman wearing a motorcycle helmet burst into Grumpy Jack's bar, in the Coombe in the city's southside last night, singled out his victim and opened fire a number of times with a handgun. The victim was taken to St James' Hospital but later died from his injuries.
