report watching the simpsons. studies computer science at wis men sister university. a spokesperson says they re sickened. the family of steven sotloff from florida now want justice. the revelation of jihadi john s name is the first step in a long road to bringing closure to the family. it is going to take time to bring him to a court of law, and to prosecute him. reporter: james foley s parents say the name of the front man for their son s killing is not their focus. in all fairness discovering who is might be important to some people but certainly not important to me. reporter: while the british daughter of another victim david haynes spoke of retribution. i think all the families will feel closure and relief. reporter: he traveled to syria in 2012. people who knew him while he lived here in london say he was known to the british security services, that he was detained