paris court friday sentence radicalize french woman 10 years prison travel syria son fight alongside islamic state militants christine riviere 51 dub investigators jihadi gran arrest 2014 three trip syria say aim spend time son case kill announce decision judge say riviere demonstrate firm commitment islamic state contribute strengthen group logistically france like european nations wrestle deal return syrian conflict presidency official say last week half 500 children bear total 2,000 french nationals residents go two countries instead try disengage son seem contrary encourage judge say investigators believe riviere son tyler vilus climb islamic state hierarchy lead francophile group arrest july 2015 turkey imprison france vilus suspect know members network plan carry november 2015 attack paris 130 people kill sentence come week mother-of-three find guilty finance terrorism send money abroad radicalize son late travel fight syria sentence two years jail 'jihadi gran get 10 years join son syria