- Jaswant Singh Chail, 21, broke into the castle grounds with a loaded crossbow on Christmas Day 2021.
- He subsequently pleaded guilty to a charge under the Treason Act, the Metropolitan Police said.
The crossbow-wielding intruder who broke into the grounds of Windsor Castle on Christmas Day 2021 with the aim of killing Queen Elizabeth II is "embarrassed" by his actions, his lawyer said.
Jaswant Singh Chail's lawyer told a court in London on Friday that he'd written an apology letter to King Charles III and the royal family regarding his plot to kill the late queen, who died September 8, 2022, Sky News reported.
Speaking on his behalf at the hearing, lawyer Nadia Chbat said Chail's letter to Charles expressed his "sadness" and "distress" at how his actions impacted the royal family.
"He has apologized to the Royal Family and His Majesty King Charles," she said. "He is embarrassed and ashamed he brought such horrific and worrying times to their front door. He has expressed relief no one was actually hurt. It is important to him there was a surrender."
Chail was 18 when he was discovered on the grounds of Windsor Castle armed with a loaded crossbow. According to the Metropolitan Police, he told the law-enforcement officer who apprehended him: "I am here to kill the Queen."
The BBC reported that Chail posted a Snapchat video moments before he entered the castle grounds, saying "I'm sorry, I'm sorry for what I've done and what I will do."
"This is revenge for those who have died in the 1919 Jallianwala Bagh massacre," he added. "It is also revenge for those who have been killed, humiliated and discriminated on because of their race."
Chail's recent statements, made on his behalf by his lawyer, came after a court had heard weeks of evidence about his mental health.
He was present at the hearing via a video link from Broadmoor, a high-security psychiatric hospital.
Earlier this week the court heard from Dr Christian Brown, Chail's psychiatrist at the hospital, who said he'd identified his patient with three features of psychosis, according to The Guardian.
"He believed at the time his entire life was leading to this point," Brown said. "From an early age he had vague plans of doing something dramatic."