The Economic Offences Unit of Bihar Police has obtained NEET’s reference question papers for comparing the documents recovered during a search operation last month, and is also exploring the “possibility of conducting narco analysis and brain mapping tests” to counter the conflicting statements of the accused, sources said on Saturday.

They also indicated that the Enforcement Directorate might investigate the money laundering aspect of the alleged irregularities in the medical entrance examination. “We had requested the National Testing Agency for the reference question papers after we began the probe last month. Finally, they did the needful. We will tally these papers with partially burnt papers seized from a Patna flat last month. This exercise is likely to be done before a forensic examination of such documents,” an EOU source said.