Le Pen and her far-right party members spent years cheating Europe's parliamentary stystem out of millions of dollars. After years of investigation, authorities have released incriminating documents and testimony, most notably correspondance between party leaders regarding how to illegally save money. In the face of mounting evidence, Le Pen faces years of prison and heafty fines.
The only reason Le Pen is being prosecuted is to keep her and her popular views on immigration away from the halls of power. As is the case with Donald Trump in America, France's left-wing establishment is using the justice system to charge its political opponent on a technicality to keep her out of office. If anyone is committing a crime, it's the government using the court system as a political tool.