Court: Buckingham Palace trespasser was convicted murderer.

Published May 20, 2016

Armed police officers work at the main gate of Buckingham Palace in London, Thursday, May 19, 2016. British police say they have arrested a man who scaled a wall and got into the grounds of Buckingham Palace. The Metropolitan Police force says a 41-year-old man was detained in the palace grounds Wednesday evening on suspicion of trespassing on a protected site. (AP Photo/Kirsty Wigglesworth) (The Associated Press)

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Armed police officers patrol in the grounds of Buckingham Palace in London, Thursday, May 19, 2016. British police say they have arrested a man who scaled a wall and got into the grounds of Buckingham Palace. The Metropolitan Police force says a 41-year-old man was detained in the palace grounds Wednesday evening on suspicion of trespassing on a protected site. (AP Photo/Kirsty Wigglesworth) (The Associated Press)

Tourists around Buckingham Palace in London, Thursday, May 19, 2016. British police say they have arrested a man who scaled a wall and got into the grounds of Buckingham Palace. The Metropolitan Police force says a 41-year-old man was detained in the palace grounds Wednesday evening on suspicion of trespassing on a protected site. (AP Photo/Kirsty Wigglesworth) (The Associated Press)

Authorities say a man who climbed over a wall and got into the grounds of Buckingham Palace while Queen Elizabeth II was at home is a convicted murderer.

Dennis Hennessy pleaded guilty to trespass at a court appearance Friday.

He was arrested in the palace grounds on Wednesday evening. Police say he was not armed.

Prosecutor Tom Nicholson told the court that 41-year-old Hennessy walked around the gardens for about 10 minutes toward the palace before being arrested. As he was detained he asked "is Ma'am in?" — the courtesy term used for the queen.

Prosecutors said Hennessy was on parole after being convicted of the murder of a homeless man in 1992.

https://www.foxnews.com/world/court-buckingham-palace-trespasser-was-convicted-murderer