The daughter whose father was tortured and starved before being publicly beheaded fears that a second member of The Beatles terror cell will apply to move to a UK jail.
David Haines was killed by the gang in Syria, with his daughter now worried that Alexanda Kotey will attempt to follow the lead of El Shafee Elsheik.
Elsheikh - known as Jihadi Ringo - is currently serving life in a high-security US jail after he was convicted in 2022 of hostage-taking and conspiring to murder.
He has applied to be switched from his Colorado prison to a UK jail under the International Prisoner Transfer Program, claiming he would like to be closer to family and friends, it was reported yesterday.
Now Bethany, 28, from Perthshire, fears Kotey, who is held at US supermax ADX Florence in Colorado alongside Elsheik, will also apply to be transferred to the UK.
Bethany, who chose to meet Kotey in 2022 as part of his plea deal, told the Sun: 'I've looked in his eyes. He's evil.
'My biggest fear is that he will apply for a transfer. He will attack the West in some way even from inside a UK prison.'
Kotey, known as Jihadi George, received a life sentence after he admitted eight charges relating to the abduction, torture and live-streamed beheadings of IS hostages in Syria.
David Haines was captured and beheaded in 2014 after being held by a four-man terrorist group of Britons dubbed 'The Beatles'
Bethany Haines, the daughter of David Haines, who was murdered by Islamic terrorists, arrives at the Albert V. Bryan Federal Courthouse in 2022 during the trial of Islamic State member El Shafee Elsheikh
Elsheikh, who was born in Sudan and grew up in London but had his British citizenship revoked in 2018, was tried by a Federal jury in Virginia and handed eight life sentences.
He, Elsheik, 'Jihadi John' Mohammed Emwazi and 'Jihadi Paul' Aine Davis were part of the IS Beatles group, who were given their name by hostages who noticed their distinctive British accents.
The gang videoed the killings of captives, of which one was aid worker David Haines - whose daughter Bethany has called Elsheikh's bid to move prisons an 'outrageous insult'.
Mr Haines, of Perth in Scotland, was abducted while working at a refugee camp in Syria in 2013. He was held hostage by Elsheikh, Kotey, Mohammed Emwazi and Aine Davis.
A horrific 2014 video showed Mr Haines kneeled next to knife-wielding Emwazi - dubbed Jihadi John - and eventually beheaded.
Families of the victims fear the prison transfer could mean a move to somewhere like London's Belmarsh where convicts have access to a number of luxuries like TVs and games consoles and can mix with other extremists.
In her concerns the bereaved daughter said she was worried Elsheikh would receive cushy treatment in the UK, adding the 'sociopath and narcissist' in reality had 'no real interest' in returning to be closer to family.
She said the convicted terrorist was 'manipulating the system to receive better conditions in prison' and so he could 'cause further pain to the victims' families'.
Bethany, whose father was tortured and starved before being publicly beheaded, said: 'He left this country to bring terror to the world and inflicted the most appalling treatment on my father and others when he held him captive.
'He is one of the worst terrorists to come from this country and it's an outrageous insult to our families for him to apply to return to one of our prisons for an easier life.'
A US notice sent to victims' relatives, seen by The Sun, says: 'This is to inform you that El Shafee Elsheikh has applied to transfer to the UK, the country of which the inmate is a national.
'The United States has prisoner transfer relationships with many countries.
'These treaties permit foreign nationals to apply to transfer and serve their sentence in their home country. Before making a decision, the US collects information about the prisoner, the views of law enforcement and any views provided by victims.'
Bethany and other relatives were given 30 days to make submissions to the US Department for Justice, which sent out its notice earlier this month.
The Ministry of Justice can refuse any transfer request.
A spokesman added any prisoners who are transferred will serve the rest of their sentence in Britain.
The gang's victims also included Americans James Foley, Steven Sotloff, Peter Kassig and Kayla Mueller.
All the hostages except Ms Mueller were executed in videotaped beheadings that ISIS released online.
Ms Mueller was forced into slavery and raped multiple times by Islamic State leader Abu Bakr al-Baghdadi before she was killed.
The deaths of Foley, Sotloff and Kassig were confirmed in 2014, while Ms Mueller’s death was confirmed in early 2015.
Elsheikh’s sentencing hearing came on the eight-year anniversary of the day that ISIS uploaded a video to YouTube showing the gruesome beheading of Foley.
Foley’s mother Diane spoke to reporters following the sentencing hearing, saying: ‘Today we remember four extraordinary young Americans.
‘These brave Americans saw the suffering of the Syrian people and decided to help, whether by providing humanitarian aid or telling the world about the tragic Syrian crisis.
‘They left a legacy of profound moral courage.’
The charges against Elsheikh, whose British citizenship was withdrawn in 2018, carried a potential death sentence, but US prosecutors had agreed not seek his execution in a deal with British officials to carry forward the case.
Elsheikh's trial, and emotional testimony from the families of his victims, gripped observers on both sides of the Atlantic.
'This prosecution unmasked the vicious and sadistic ISIS Beatles,' said First Assistant US Attorney Raj Parekh, noting that Elsheikh and the other Beatles always wore masks when they appeared in front of their hostages.
'This is one of the most significant international terrorism cases ever brought to trial,' said Commander Richard Smith, head of counterterrorism at London's Metropolitan Police Service.'