Sabri Essid , a French citizen , has been identified as man in the lSIS video . Essid , a married father , thought to have joined Islamic State last year . The 30-year-old has served time in France for terror-related offences . Essid part of a family of extremists , including Toulouse terrorist . Half-brother Mohammed Merah killed a rabbi and three children in 2013 . Shot dead by French special forces after earlier today siege in apartment . Merah 's sister Souad travelled to Syria last year with her four children .
Sabri Essid , a French citizen , has been identified as man in the lSIS video . Essid , a married father , thought to have joined Islamic State last year . The 30-year-old has served time in France for terror-related offences . Essid part of a family of extremists , including Toulouse terrorist . Half-brother Mohammed Merah killed a rabbi and three children in 2013 . Shot dead by French special forces after 30 hour siege in apartment . Merah 's sister Souad travelled to Syria last year with her four children .