Dungadin:

Some would agree that by definition that a person is a criminal if convicted of a crime. In the legal sense you are not a criminal if you have not been convicted of a crime. If you correctly heard the officer say "you are considered a criminal" because you might have failed a polygraph exam then you should prcoeed to get some answers.  At the very least  I would suggest that you speak to that officers superior, relay everything that transpired and ask why you are " being considered a criminal."