The Congress's key troubleshooter in Karnataka, DK Shivakumar, has to be questioned in custody for 14 days, the Enforcement Directorate told a Delhi court today. The agency had arrested Mr Shivakumar last evening, claiming he was not cooperating in the investigation a money laundering case. Countering the agency's demand, Mr Shivakumar argued that not confessing to a crime does not amount to non-cooperation.