A criminal investigation is an official effort to uncover
 information about a crime.
                            There are
                            generally
                            three
                            ways 
that a person can be brought to justice for a criminal act.
 First, and
                            probably the
                            least
                            likely, the
                            individual will be
 driven by his conscience to immediately confess. Second,
 an
                            officer of
                            the law
                            can catch him
                            in the act. Third, and 
most common, a criminal investigation can identify him as
                            suspect,
                            after
                            which he may
                            confess or be convicted by trial.
                        
criminal investigation is an official effort to uncover information about a crime. There are generally three ways that a person can be brought to justice for a criminal act. First, and probably the least likely, the individual will be driven by his conscience to immediately confess. Second, an officer of the law can catch him in the act. Third, and most common, a criminal investigation can identify him as suspect, after which he may confess or be convicted by trial.