But in this case how can we make sure the "Office of Inspector General" would be un-baised and will fairly reply to our complain ?
A: There is no way to be certain that your complaint will be taken seriously -- other than to complain to more than one person, such as the House or Senate Select Foreign Intelligence Subcommittee.
Is it possible to raise a complain or legal case through a local court and from there it can be escalated furthuremore ?
A: It's lawful for a person injured by a U.S. government agency to sue the agency. However, where national security interests are concerned, the U.S. Government can exercise its rights to the national security exception and ask a court to dismiss the case. Overwhelmingly, the U.S. courts will dismiss such cases. Thus, legal action against the CIA will generally be futile.
Moreover, suing the United States in U.S. District Court is extremely expensive. Assuming that a court were to accept your case, you could easily spend $100,000 USD in legal fees to bring a case against the CIA, and you could lose. So, it makes little sense to use the court system to challenge the CIA. The Inspector General complaint, plus a complaint to the House and Senate Select Foreign Intelligence Subcommittees is really your only logical option.
You can also contact the media. Any U.S. news media source (AP, UPI, CNN, NBC, ABC, CBS, NY Times, Washington Post, Reuters, Bloomberg, etc.) would probably be very interested in your complaint. And, if the news media investigates, this usually means that Congress and the Inspector General will be very interested. Perhaps even President Obama would be interested at that point.
Hope this helps.