Noted Nazi hunters Serge and Beate Klarsfeld helped bring him to trial, where Serge and his son, Arno, represented the families of the victims. Other important collaborators, such as René Bousquet, head of the French police under Vichy, did not go to trial. Bousquet himself would be assassinated in 1993, shortly before his trial was to start. His adjunct, Jean Leguay, would die of cancer in 1989 before he could go on trial, a decade after he had been indicted for crimes against humanity for his role in the Vel' d'Hiv Roundup in July 1942. In 1995, President Chirac recognized the French state's complicity in the roundup.