link.Duffy pled guilty to being concerned in the supply of cocaine.The High Court in Glasgow heard how the cocaine had a purity as high as 77 per cent.Defence counsel Louise Arrol told the court the construction worker and dad-of-one had a cocaine addiction.Man jailed for murdering EK Big Issue seller, Paul KellyShe told court how Duffy had agreed to become involved in the drugs trade to help out with his substantial debts.She added: “This was a significant addiction that amounted to debts of