CHARTRES, France (Reuters) - Ismael Omar Mostefai, the first of the perpetrators of the bloody massacre in Paris to have been identified, personified the dilemma facing French authorities as they struggle to fight an enemy they cannot find.
Tall with a slight beard, often clad in a djellaba robe, the 29-year-old French citizen lived in a modest house in a suburb of Chartres, a town southwest of Paris far better known for its magnificent cathedral than as a hotbed of Islamist radicalism.
