Ex-Customs Boss, Alhaji Abdullahi Dikko who was arrested by the Economic and Financial Crimes Commission (EFCC) has refunded over N1 billion to the Federal Government of Nigeria. Sources at the EFCC said he also retuned another N4 million. Besides, his palatial house at Audu Ogbeh Street, Jabi, Abuja valued at N2 billion has been seized by the EFCC.