"It may turn out that the remaining documents are innocuous, but we do not know.
"We need to see them [as they may] show a pattern of the bias.''
Ms Collins' office was "fighting like fury'' to keep the documents from Mr Bain's legal team in an attempt to run them ragged, Mr Reed said.
He earlier told Justice Keane that Ms Collins had been biased and prejudiced in her handling of the Bain case.
The entire process had been hijacked by Crown Law and police, Mr Reed said.
He read a document from former Canadian Supreme Court Judge Ian Binnie saying, "at the moment the Minister Collins' process looks very one-sided''.
Ms Collins was acting as the Minister of Police, not the Minister of Justice and was struggling to distinguish between the two, Mr Reed said.
David Bain is seeking a judicial review into how Ms Collins handled the Binnie report into his claim for compensation.