Local Government Minister Jim Cox said he would not be drawn into a "mud- slinging match" over who should take responsibility for the Tamar River silt problem. Rosevears Independent MLC Kerry Finch said yesterday with the Launceston City Council attacking Bass Labor MHR Jodie Campbell for her lack of support on the issue it was important Mr Cox outline who should take ownership of the problem. Mr Cox said he would not comment on the debate, and would wait to see the results of the independent study that the State Government has helped fund.