DRDO scientist Pradeep Kurulkar, who was arrested in May under the Official Secrets Act, was attracted to a Pakistani operative agent, the Anti-Terrorism Squad (ATS) of the Maharashtra Police said in its chargesheet. He chatted with the agent, who used the alias 'Zara Dasgupta', about Indian missile systems and other defence projects. 'Zara' befriended him by sending him obscene messages.