PETER KASSIG

A jury has convicted a British national for his role in an Islamic State group hostage-taking scheme that took roughly two dozen Westerners captive a decade ago.

The ISIS kidnap-and-murder cell known as the "Beatles" held at least 27 foreign hostages in Syria between 2012 and 2015.

Mueller was raped by Islamic State leader Abu Bakr al-Baghdadi before she was killed. And they heard testimony from French hostage Nicolas Henin, who survived 300 days of captivity before his release in 2014. In his later months of captivity, he came across the Beatles, who were already recognized by his fellow hostages as particularly sadistic. Prosecutors have said that Elsheikh is “Ringo,” though none of the hostages who has yet testified has been able to explicitly identify him. Witnesses have said all the Beatles took great pains to keep their faces fully masked when they were in contact with the hostages.

Jurors at the terrorism trial of British national El Shafee Elsheikh are hearing emotional testimony as the trial stretches into its second week in a Virginia courtroom.

A hostage who survived more than a year as a captive of the Islamic State is testifying about the beatings and torture inflicted on him by his captors.

A British national has admitted in federal court that he played a leadership role in an Islamic State scheme to torture, hold for ransom and eventually behead American hostages.

One of two British nationals charged with joining with the Islamic State group and conspiring to torture and behead American and European hostages in Syria is scheduled to plead guilty to criminal charges.

(AP Photo/Hussein Malla, File)ALEXANDRIA, Va. – Two British men charged with helping the Islamic State group carry out executions and ransom negotiations for Western hostages pleaded not guilty Friday in a federal court. At a brief hearing Friday in the court just outside Washington, D.C., the two men pleaded not guilty and requested a jury trial. No trial date was set after both men waived their right to a speedy trial because of the case's complexity. A status hearing was set for Jan. 15 to set a trial date then. “This involves a long investigation involving multiple countries,” Fitzpatrick said when asked about the volume of evidence that must be weighed.

El Shafee Elsheikh and Alexanda Kotey are two of four men who were dubbed “the Beatles” by the hostages because of the captors' British accents. The charges are a milestone in a yearslong effort by U.S. authorities to bring to justice members of the group known for beheadings and barbaric treatment of aid workers, journalists and other hostages in Syria. “If you have American blood in your veins or American blood on your hands, you will face American justice,” said Demers, the department's top national security official. The indictment charges the men in connection with the deaths of four American hostages — Foley, journalist Steven Sotloff and aid workers Peter Kassig and Kayla Mueller — as well as European and Japanese nationals who were also held captive. In July 2014, according to the indictment, Elsheikh described to a family member his participation in an IS attack on the Syrian Army.

Peter Kassig's parents: "Our hearts are battered" The parents of the murdered American hostage spoke to reporters on Monday, a day after it was confirmed that their son was executed by ISIS. U.S. officials say that the country will not be swayed by terror. Margaret Brennan reports from Washington.

ISIS beheads American Peter Kassig, threatens more deaths After holding him captive for more than a year, ISIS released a video announcing the murder of the 26-year-old American aid worker Peter Kassig. President Obama is calling it "an act of pure evil by a terrorist group." Margaret Brennan reports.

11/16: ISIS executes another American hostage; New Jersey dig site reveals exciting fossils The White House confirmed what ISIS has claimed this weekend: American Peter Kassig has been executed. Like previous ISIS execution videos, this one features the same, black masked killer with a British accent, known as "Jihadi John"; and, a dig site in New Jersey behind a strip mall is yielding interesting finds: the fossils of animals believed killed around the same time the dinosaurs disappeared.

ISIS executes another American hostage The White House confirmed what ISIS has claimed this weekend: American Peter Kassig has been executed. Like previous ISIS execution videos, this one features the same, black masked killer with a British accent, known as “Jihadi John.” Julianna Goldman reports.

New ISIS video claims to show beheading of American Peter Kassig CBS News' Charlie D'Agata reports on the reaction to a video purporting to show the execution of an American aid worker at the hands of terrorists.

Parents of ISIS hostage suffered in silence ISIS has beheaded three western hostages and is threatening to do the same to American aid worker Peter Kassig. In an interview with Margaret Brennan, his parents described the shock of seeing their son in an ISIS video on TV as they dined in a hotel restaurant.

Parents of American hostage Peter Kassig ask ISIS for mercy Kassig has been held by ISIS for more than a year. In the latest ISIS execution video, the terror group threatened to kill him next. Kassig's parents speak to Margaret Brennan in their first television interview.

After beheading of British aid worker, ISIS threatens life of American Peter Kassig Alan Henning, a British taxi driver who traveled to Syria as an aid worker, was beheaded by ISIS in Syria on Friday. Now, in their usual habit of threatening the life of another hostage, ISIS is threatening to kill Peter Kassig who converted to Islam in captivity. Holly Williams reports from Istanbul.

Parents of American ISIS hostage appeal for son’s release A day after ISIS released video of the beheading of British hostage Alan Henning, the parents of American hostage Peter Kassig are making a video appeal for their son’s release. ISIS militants say he’s next. Charlie D’Agata reports.