Family of Journalist Slain by ISIS Speaks Out

Steven Sotloff wanted to "give voice" to those without, family says.
2:39 | 09/03/14

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Transcript for Family of Journalist Slain by ISIS Speaks Out
Urgent manhunt tonight for the -- man on that awful tape. Standing next to the second American murdered by ices the man with a -- but what sounds like a British -- and executing a second American journalist Stephen salt off. He was just 31. And tonight here you're about to see some new clues unintended clues in some of their many videos. And there is an intense focus on one Syrian city scene right here in this video where it's believed to more Americans could be held. Tonight with President Obama is now saying as we show you those new clues and we lead off with ABC's chief investigative correspondent Brian -- The urgent search for the remaining two US and other western hostages is being carried out twice by planes and satellites. Over the ice a stronghold of the Syrian city of rock. Yeah. Yeah. This is where US officials believe prices staged its barbaric murders of journalists Stephen sub often James Foley. Today the president -- -- will pay the price. We will not be intimidated. And -- horrific acts only unite us as a country and -- our results take the fight against these terrorists. The ice is commander Abu -- are all about -- and his key deputies are prime targets for the US. And so is that included British speaker seen in the hostage videos -- Barack Obama. And others from -- not seen but clearly part of the execution and video team. Those who make the mistake of harming Americans will learn that we will not forget and that our reach is long and that justice will be served. In the search for clues some of the recent gruesome -- -- and offer unintended lead us here at the camera pants and briefly catches a glimpse. Of one of the -- camera operates. And then another -- -- it's part of the all important propagandist. That records and distributes the brutal -- -- act of -- indication that follows the active -- Is almost as important if not more important than the act of violence itself. Today the family of Stephen sub -- said they were privately grieving for their 31 year old journalist son. A friend speaking for the family said -- -- died as he lived courageously. We will not allow our enemies to hold us hostage with the stole weapons they possess. Fear. And now the goal to find some way to say the remaining American and western hostages special forces veterans say. Even with ice as terrorists on alert after the first unsuccessful hostage rescue mission. A second attempt by American special forces would be much for difficult. With -- they say if not impossible -- Brian Ross started us off tonight Brian thing.

This transcript has been automatically generated and may not be 100% accurate.

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