The Central Bureau of Investigation has some documents, which indicate that former Chhattisgrah chief minister Ajit Jogi's son, Amit, was involved in making the videotape implicating Dilip Singh Judeo in bribery allegations.

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The agency is examining some videotapes and compact discs seized from Amit's residence, sources said. It is also scrutinising passbooks of several bank accounts seized during the raids on December 21.