A lab technician handles a sample of DNA at the Genetic Institute Nantes-Atlantique (IGNA) on December 10, 2015 in Nantes, western France. 
The Genetic Institute Nantes-Atlantique (IGNA) is one of the first French laboratories of forensic expertise to use DNA evidence to establish the physical characteristics of a suspect and so his &quot;genetic sketch,&quot; can be used as a &quot;support tool &quot;  in an investigation. / AFP / GEORGES GOBET