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A timeline of events at Windsor on Christmas morning (Picture: Metro Graphics)

The father of the suspect accused of scaling Windsor Castle on Christmas Day armed with a crossbow today said ‘something’s gone horribly wrong with our son’.  

Jaswant Singh Chail is said to have used a rope ladder to climb a metal fence at the royal grounds around 8.30am, sparking a huge security alert.  

The 19-year-old was detained under the Mental Health Act after being arrested on suspicion of breaching or trespassing a protected site and possession of an offensive weapon.   

Now Scotland Yard is investigating a video of a masked man allegedly revealing a plot to ‘assassinate the Queen’ in a ‘revenge’ mission

Chail is alleged to have sent the video from his Snapchat account 24 minutes before the incident at Windsor.  

Detectives are currently ‘assessing the contents’ of the footage.  

His father, Jasbir Singh Chail, 57, told MailOnline: ‘Something’s gone horribly wrong with our son and we are trying to figure out what. 

‘We’ve not had a chance to speak to him but are trying to get him the help he needs.  

Mandatory Credit: Photo by Geoffrey Swaine/REX/Shutterstock (12659408w) People walk around Windsor town in the rain and mist on Boxing Day. Seasonal weather, Royal Windsor, Berkshire, UK - 26 Dec 2021
The security breach at Windsor Castle happened around 8.30am on Christmas Day (Picture: Geoffrey Swaine/REX/Shutterstock)

‘From our perspective, we are going through a difficult time.  

‘We are trying to resolve this issue and it’s not easy.’ 

The Snapchat video, said to have been inspired by Star Wars, described plans to avenge the victims of the Amritsar massacre, known as the Jallianwala Bagh massacre, on April 13, 1919.  

Hundreds of people died after protestors peacefully demonstrating against British colonial rule were trapped and shot down.  

The hooded figure tells viewers: ‘I’m sorry. I’m sorry for what I’ve done and what I will do.  

Shocking video shows crossbow-wielding man threatening to ?assassinate the Queen in revenge for 1919 Amritsar massacre? ? as 19-year-old who scaled Windsor Castle walls is sectioned Footage shows crossbow-wielding figure threatening to 'assassinate the Queen' It is understood to be the 19-year-old male suspect, from Southampton, in video Armed intruder was arrested in the grounds of Windsor Castle on Christmas Day Suspect, who was carrying a crossbow, was sectioned under Mental Health Act Security were alerted to his presence when alarm was triggered around 8:30am
The crossbow-wielding man threatens to assassinate the Queen in video being investigated by police (Picture: The Sun)

‘I will attempt to assassinate Elizabeth, Queen of the Royal Family. 

‘This is revenge for those who have died in the 1919 Jallianwala Bagh massacre.  

‘It is also revenge for those who have been killed, humiliated and discriminated on because of their race. 

‘I’m an Indian Sikh, a Sith. My name was Jaswant Singh Chail, my name is Darth Jones.’ 

Chail, known to friends as ‘Jas’, is said to have been raised in a £500,000 semi-detached home on a private estate in North Baddesley, a middle-class area in Southampton, according to the Mail.  

The incident on Christmas Day has triggered fears for the Queen’s safety – as Princess Diana’s former bodyguard warned security needed to be ‘beefed up’ to avoid a ‘tragic scenario’.  

NOT FOR USE AFTER 30th April 2022 without clearance from Buckingham Palace Press Office. This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Mandatory Credit: Photo by Buckingham Palace/WPA Pool/REX/Shutterstock (12583813b) Undated Buckingham Palace handout image of a video grab taken from Queen Elizabeth II II's video message, which was played during a welcoming reception at Cop26 this evening Queen Elizabeth II COP26 video message, UK - 01 Nov 2021
The incident has sparked fears for the Queen’s safety amid concerns security should be ‘beefed up’ (Picture: Buckingham Palace/WPA Pool/REX/Shutterstock)

And the former head of the royal protection unit also suggested Windsor is ‘having an issue with intruders’, urging staff to deal with the problem before ‘something more sinister comes to pass.’   

The alleged break-in left a ‘chill in the air over what could have been’, royal sources said.