this Wednesday night, and we begin with the new video from one American mother asking the terrorists of Isis to show humanity. Asking that they be merciful and let her son live. They are the same... See More
this Wednesday night, and we begin with the new video from one American mother asking the terrorists of Isis to show humanity. Asking that they be merciful and let her son live. They are the same killers who executed James Foley, and tonight we are learning more about them. As that other American journalist released after nearly two years is home and speaking for the first time. ABC's chief investigative correspondent Brian Ross back on the story for us. I am Shirley sotloff. My son Stephen is in your hands. Reporter: The mother's emotional plea came eight days after Isis said it would execute her 31-year-old journalist son, seen in the same video release that showed the execution of James Foley. I want what every mother wants, to live to see her children's children. Reporter: Shirley sotloff directed her plea personally to the Isis leader, Abu Bakr al-baghdadi, a brutal megalomaniac who claims he is the caliph, the prince of the Muslim world, and that is how she addressed him. I've always learned that you, the caliph, can grant amnesty. I ask that you please release my child. Reporter: For another American mother today, anguish turned into joy as her son, journalist peter Theo Curtis, returned home to Cambridge, Massachusetts after being held for two years by a different jihadist group in Syria. I had no idea when I was in prison that so much effort was being expended on my behalf. Now having found out, I am just overwhelmed with emotion. Reporter: As much as the American hostages have focused attention on Syrian terror groups, it is the American recruits who have joined them that most worry authorities. Today, new details emerged about the background of this American, Douglas Mcarthur McCain, killed fighting for Isis in Syria over the weekend. It turns out McCain's high school in suburban Minneapolis, the robbinsdale cooper school, brought together at least two midwestern boys who went on to become terrorists. This family photo shows McCain on the left, and on the right, his high school class meat and friend, troy kastigar, who later died fighting for the Al Qaeda group in Somalia. There was no indication while they were students of ours that they would turn to violence. Reporter: Could there be a third jihadist from the high school. This video of a Syrian militant shows the gunman wearing a sweat shirt that sauce cooper hawks, the lettering of the high school athletic mascot, the hawks. As Steve sotloff's mother awaits word on the fate of her son, the U.S. Announced today it had carried out three more air strikes against Isis, clearly ignoring the terrorist threat to kill sotloff if the bombing continued. With the very latest as always, thank you Brian. Now we turn to another big
This transcript has been automatically generated and may not be 100% accurate.