An undercover ITV Cymru Wales reporter has exposed the extent of Llanelli's drugs problem, obtaining a gram of the class B drug Mephedrone, after just an hour on the streets of the town.
Recent figures show that of a hundred offences committed relating to the drug - commonly known as Meow Meow - in Carmarthenshire in just six months nearly half were in Llanelli.
The investigation is part of a special Hacio programme to be broadcast on S4C at 10pm on Wednesday.
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Adrian Masters and Owain Phillips present Monday's programme from Birmingham and Cardiff.