A man stabbed a 21 – year-old man to death in an act of “pitiless savagery” before going on the run for more than three years, a court has heard.
Shane O’Brien, 31, appeared at the Old Bailey on Monday at the start of his murder trial.
The court was told he slashed the neck of Josh Hanson following a short conversation in RE Bar, Hillingdon, west London, in October 2015.
The victim died at the scene following the “sudden and shocking” incident.
The pair had never met before their brief encounter in the bar, jurors were told.
Mark Heywood QC, prosecuting, said: “For reasons that have yet to be fully explained, the defendant stood up and approached the other man.
“As they spoke briefly, with others around them, the defendant reached for his blade and with a single, slashing motion, he used it. He cut his throat.
“You will judge for yourselves when you have heard the evidence but it was an act of pitiless savagery.”
Mr Heywood said O’Brien had admitted to using the weapon to kill Mr Hanson, however he believes he is not “criminally responsible” because he did not mean for it to happen.
O’Brien, a father-of-two, pleaded not guilty to the murder in July .
The trial continues.
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