A convicted murderer described by police in court as a disaffected republican has been remanded in custody on money laundering and fraud charges.
In court was Seamus Francis Mullan, 52, from Lisnascreaghog Road in Garvagh.
He denies acquiring criminal property, having almost a quarter of a million illegal cigarettes and dishonestly obtaining nearly £20,000 in benefits.
Mullan, who served a 14-year prison sentence for murder, had assets worth £300,000 frozen earlier on Thursday.
That happened at a hearing at the High Court in Belfast.
Mullan was refused bail at Londonderry Magistrates' Court after a senior detective warned he was likely to re-offend and interfere with witnesses.
He was arrested during police raids on 16 houses in Limavady
and Coleraine on Tuesday in which a number of people were arrested.
Mullan's solicitor, Thomas Doherty, disputed the scale of his client's estate and told the court there were large areas of the case against him which he contested.
The accused was remanded in custody to appear again on 11 January.