A former Royal Marine accused of spying for Hong Kong’s intelligence service has died in unexplained circumstances in a park in Berkshire.
Matthew Trickett, 37, was charged with offences under the National Security Act earlier this month.
His family said in a statement: “We are mourning the loss of a much-loved son, brother and family member.”
They also appealed for privacy “at this difficult time”.
Thames Valley Police said officers were called to Grenfell Park, Maidenhead, at around 5.15pm on Sunday following a report from a member of the public.
The force said in a statement: “Officers attended the scene and found a man. Emergency treatment was commenced but sadly the man was pronounced dead at the scene.
“An investigation is ongoing into the death, which is currently being treated as unexplained.
“Formal identification has taken place and we can confirm the man is Matthew Trickett, aged 37, from Maidenhead.
“His family have been informed and they are being supported by officers. We would kindly ask that their privacy is respected at this difficult time.”
The force added that a post-mortem would be conducted in “due course”.
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Trickett and two other men were charged with assisting a foreign intelligence service, contrary to the National Security Act, and with foreign interference, contrary to the National Security Act.
“The foreign intelligence service to which the charges relate is that of Hong Kong,” the Metropolitan Police said at the time.
It was alleged that between 20 December and 2 May, the trio agreed to undertake information gathering, surveillance and acts of deception that were likely to materially assist a foreign intelligence service.
They were also accused of forcing entry to a UK residential address on 1 May.
Trickett appeared at Westminster Magistrates’ Court on 13 May, where he spoke only to confirm his name.
He was then released on bail and was next due to appear at the Old Bailey in London on Friday.
At the time, police said that while the alleged offences were “concerning”, there was not believed to be any wider threat to the public.
Case referred to police watchdog
Thames Valley Police confirmed that Trickett’s case had been referred to the police watchdog, the Independent Office for Police Conduct (IOPC), because he had been “on court bail, awaiting court proceedings, which required him to register at a police station regularly”.
The force said a referral was “normal in such circumstances where there has been a death following police contact.”
It added: “The IOPC have assessed that referral and decided that the matter should be investigated by Thames Valley Police’s Professional Standards Department.”
Trickett’s solicitor Julian Hayes, a senior partner at Berris Law, said: “It has sadly been confirmed by Thames Valley Police, that the body found… was that of our client.
“We are naturally shocked at this news and supporting his family as best we can.
“The death is currently being treated as unexplained by the police and further investigations are still ongoing.”
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Mr Hayes added: “Following a mandatory referral [to] the Independent Office for Police Conduct, due to the prior contact with police, the matter has now been passed on to Thames Valley Police’s Professional Standards Department.
“It would therefore not be appropriate for us or the family to comment any further at this stage.”