"We are presently scrutinising the documents and articles seized so far to ascertain the possibility of a DA case against him," a CBI official said.
Meanwhile, a special CBI court today remanded Kumar to judicial custody till September 12. He will be lodged in Taloja Jail in Navi Mumbai.
The court is likely to hear his bail application tomorrow, Kumar's advocate Mahesh Vaswani said.
CBI today told the court that on August 16, two days before Kumar's arrest, his wife Surabhi had in a "hush-hush" way operated the locker held by her at Axis Bank in Delhi.
Kumar was arrested on August 18 by CBI after a Censor Board agent and a member of advisory panel of the Board were arrested.
An Indian Railways Personnel Officer, Kumar had joined as the CEO of CBFC in January.