Mass DNA tests at French school over rape
15 April 2014 Last updated at 05:58 BST
DNA tests are being carried out on more than 500 male students and teachers at a high school in La Rochelle where a girl was raped last September.
The 16-year-old was assaulted in dark toilets at Fenelon-Notre Dame, a private Roman Catholic school in the Atlantic port city.
Wendy Urquhart reports.