Thu 06 Jun 2004Toscan du Plantier file still open, insists gardaGardaí have insisted that the file on the murder of Frenchwoman Sophie Toscan du Plantier remains open after her son criticised the Irish justice system for "going around in circles" and failing to prosecute in the case.Chief Supt Kieran McGann of West Cork Garda Division said last night that Ms Toscan du Plantier's murder remains under investigation.