Complicated Cops

Why would undercover cops accuse four innocent men? Thank goodness for a video camera which proved their innocence, but 2 of them lost their job and savings on that false accusation and most importantly - their trust in the judicial system. Read the full article here: http://wcbstv.com/local/Undercover.NYPD.Officers.2.759420.html I still want to believe this does not happen here in Quebec: how long will I be that naive?