If the FBI comes to your door to interview you, or escorts you to the prosecutor's office, you certainly have a right to call a lawyer. This may seem self-serving, but it probably wouldn't be ideal to call a civil practitioner. He or she may be great at what they do, but they don't necessarily know the rules of engagement in the criminal game. They might not even know that it's perfectly permissible, often precisely the right thing, to tell the FBI or other law enforcement officer to simply back off—"I've got nothing to say to you"—that is, unless they happen to be aficionados of TV cop shows (not quite the knowledge you want your lawyer to rely on).