Ask your friends, family and coworkers for recommendations for a good government harassment lawyer. You should also talk to any lawyers you know and ask them to recommend any colleagues that have handled government harassment cases in the past.
Use the American Bar Association and your state's bar association to search for members who have experience with government harassment cases. An added benefit is your state bar association will also be able to tell you about any complaint cases about each lawyer. This will help you avoid government harassment attorneys that may be using unethical practices.
Check the news for any high-profile government harassment cases and note the lawyer trying the case. Be prepared to pay top dollar for a high-profile government harassment lawyer. You may also have to wait until his or her schedule can accommodate your case.
Contact any civil rights groups that may have connections with government harassment cases. They may be able to put you in contact with a government harassment lawyer.