Jean-Marie Beney, public prosecutor general, arrives for the trial of the serial killer Francis Heaulme, on April 25, 2016 in Metz, eastern France. Francis Heaulme, who is already serving a life sentence for six murders, is accused of the murder of two children, Alexandre Beckrich and Cyril Beyning, found dead on September 28, 1986 in Montigny-les-Metz. / AFP PHOTO / Jean Christophe VERHAEGEN