Greece's former Defence Minister Yiannos Papantoniou and his wife Stavroula Kourakou testify against charges of money laundering.
The couple will go before examining magistrates to answer to charges of legalising 2.8 million Swiss francs from illegal activities.
The former Pasok Minister is accused of having received bribes as part of a military contract which involved advocating for one company over another for a contract involving the upgrade of six S-type Greek Navy frigates.
Papantoniou allegedly used a number of bank accounts to hide the money he received, through which he made hundreds of financial-sector transactions in order to make it virtually impossible to trace the money, while at the same time making the transactions appear legitimate.
Also accused in the same case is the civil engineer Andreas Bardis, who alleged assisted Papantoniou in covering his tracks through various accounts and real estate transactions.