New Delhi: After questioning his wife Pratibha recently, the Enforcement Directorate (ED) is set to grill Himachal Pradesh Chief Minister Virbhadra Singh s son Vikramaditya in connection with a money laundering case registered against his father and others. Official sources said the Investigating Officer (IO) of the case will soon issue a fresh summon to Vikramaditya for questioning in the case after he skipped the earlier summons in this regard scheduled for September 1. They said once he meets the IO, it is expected that Vikramaditya's statement will be recorded under the provisions of the Prevention of Money Laundering Act (PMLA). The agency had earlier recorded the statement of Singh's wife Pratibha in the same case last month. ED also filed the first charge sheet in the case today at a court here involving the role of arrested LIC agent Anand Chauhan in the case. The agency had attached assets worth about Rs eight crore of the Chief Minister earlier this year. Singh has denied allegations of any wrongdoing by him and his family. ED had filed a case under criminal provisions of the anti-money laundering law after taking cognisance of a complaint filed by the CBI in this regard in September last year. It had also conducted searches in this case last year in Delhi, Maharashtra and West Bengal. The agency is probing allegations against Singh and his family members of having amassed wealth of Rs 6.1 crore disproportionate to his known sources of income between 2009 and 2011 when he was the Union Minister of Steel. The CBI s First Information Report had named Singh, Pratibha, Chauhan and his brother C L Chauhan, who were all accused of violating the provisions of the Prevention of Corruption Act. CBI FIR said that during 2009-11, Singh bought life insurance policies worth Rs 6.1 crore in his and his family members names through Chauhan claiming it came from his income from agriculture.