The father of the man who claimed he would “assassinate the Queen” on Christmas Day has broken his silence to claim his son “needs help”.
A 19-year-old, from Southampton, was arrested on suspicion of breach or trespass of a protected site and possession of an offensive weapon.
He was sectioned under the Mental Health Act and remains in the care of medical professionals.
His father told the Daily Mail: “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.
“From our perspective, we are going through a difficult time, we are trying to resolve this issue and it’s not easy.”
It comes as chilling footage appearing to show a crossbow-wielding man threatening to “assassinate the Queen in revenge for 1919 Amritsar massacre” is being investigated by the Metropolitan Police.
The clip surfaced believed to be linked to the incident where a 19-year-old man was arrested on Christmas Day within the grounds of the castle in Berkshire where the Queen is staying with her family.
Chilling footage, obtained by The Sun, appeared to show a masked figure wearing a dark hoodie and wielding a crossbow.
It appeared to reveal a distorted voice saying they wanted to “assassinate the Queen” in a “revenge” mission.
In a video message, the man said: “I’m sorry. I’m sorry for what I’ve done and what I will do. 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.”
A spokesperson from Scotland Yard said: “Security processes were triggered within moments of the man entering the grounds and he did not enter any buildings.
“Following a search of the man, a crossbow was recovered.”
They added: “Inquiries into the full circumstances of this incident are being progressed by Metropolitan Police specialist operations.”
The Queen spent Christmas Day at Windsor Castle.
A palace source said: “It is obviously a worry to have to deal with a break in like this, especially after Her Majesty has been through so much this year and in the lead up to Christmas.
“There will have to be a major evaluation of the security procedures and protocols after this event.
“Fortunately the intruder was apprehended and police were on the scene almost immediately but there is a chill in the air over what could have been.”
Buckingham Palace has declined to comment on the incident.
She was expected to have lunch with the Prince of Wales and the Duchess of Cornwall as well as the Earl and Countess of Wessex.