Thanks for your response.
I believe and agree with everything you said above, except for two things:
"What you might see in the movies is rarely factual." I believe that many movies with scenes of trials are based on facts, even though they may be dramatized somewhat.
"A court generally determines the level of guilt and the severity of punishment, not that the person was or was not a criminal." If the person is found guilty of a crime, then they are, by definition, a "criminal." If they are found not guilty in this one case, they still could be a criminal, but not from the judgment of this one case. They may be a criminal because they have been found guilty in a prior case, or have admitted their guilt without going to trial.
You also bring up an interesting point when you write, "I also decided, on my own volition, that a violation of crime was unintentional and closed the investigation, not seeking punishment for the individual as there was no harm done." That, for me, raises the question of whether or not a person is a criminal if they UNINTENTIONALLY committed a crime and/or there was, at least in your judgement, NO HARM DONE. These are aspects of a crime that, IMO, should be decided by a prosecutor, judge, or jury, not by an investigator.