A man who was left with a rare flesh eating disease after his lover’s GP son disguised himself as a nurse to poison him with a fake Covid booster jab has been pictured for the first time. Patrick O’Hara was given a poison-laced injection by Thomas Kwan, 53, the son of his long-time lover Jenny Leung at the home they shared in Newcastle.Kwan, who put on a bizarre disguise consisting of a fake beard and a hairpiece before injecting Mr O’Hara, wanted to inherit his mother’s home but they had fallen out after she decided she wanted to give it to her partner of 20 years instead. The ‘money obsessed’ GP hoarded the ingredients for ricin and was initially believed to have used the chemical weapon in the attack on January 22 but police now believe it was more likely a pesticide. Mr O’Hara, 72, developed a rare flesh-eating disease from the injection but narrowly survived. Kwan had initially denied attempted murder but changed his plea after he heard the prosecution open the case against him last week.  Patrick O’Hara (pictured) was given a poison-laced injection by Thomas Kwan, 53, the son of his long-time lover Jenny Leung at the home they shared in Newcastle Kwan’s mother, Wai King – also known as Jenny Leung – is pictured outside court during an earlier hearing  Thomas Kwan, 53, has admitted trying to murder Patrick O’Hara at the home he shared with the doctor’s mother in Newcastle Kwan is seen in a selfie wearing a disguise of a fake hairpiece, beard and moustache. He took this selfie in order to create a fake ID under the name ‘Raj Patel’ Prosecutors described how Kwan was estranged from Ms Leung after falling out with her over her plans to leave her home to Mr O’Hara, who she had been in a relationship with for more than 20 years.’The effect of the will was that the property would not go to Ms Leung’s children until after Mr O’Hara’s death,’ Peter Makepeace KC  said.On November 15, 2022, Kwan pushed past Mr O’Hara to get into his mother’s home and began grilling her about the will. Mr O’Hara called police and Kwan was given a warning.Kwan, a partner and practising GP at the Happy House surgery in Sunderland, went back to his £300,000 home in Ingleby Barwick, Teesside, where he lived with his wife and young son, to devise a plot to kill him. The Hong Kong-born doctor had developed an ‘encyclopaedic knowledge’ of poisons, the court heard, and he studied how to get away with murder, police discovered from analysis of his home computers.Kwan sparked a major emergency services operation when police found lethal chemicals stored in the detached garage of his family home.  The prosecution described him as ‘money-obsessed’ and said he even installed spyware on his mother’s laptop so he could monitor her finances. Before pleading guilty to attempted murder today, the Sunderland-based GP had already pleaded guilty to administering a noxious substance, claiming he meant to cause no more than mild pain.The Crown’s case was that he meant to kill his mother’s partner of more than 20 years, who developed a rare flesh-eating disease as a result of the jab in his arm.Opening the case on Thursday, Peter Makepeace KC, prosecuting, said: ‘Mr Thomas Kwan, the defendant in the case, was in January of this year a respected and experienced medical doctor in general practice with a GP’s surgery based in Sunderland.’From November 2023 at the latest, and probably long before then, he devised an intricate plan to kill his mother’s long-term partner, a man called Patrick O’Hara.’On any view, that man had done absolutely nothing to offend Mr Kwan in any way whatsoever.’He was, however, a potential impediment to Mr Kwan inheriting his mother’s estate upon her death.’Mr Kwan used his encyclopaedic knowledge of, and research into, poisons to carry out his plan.’That plan was to disguise himself as a community nurse, attend Mr O’Hara’s address, the home he shared with the defendant’s mother, and inject him with a dangerous poison under the pretext of administering a Covid booster injection.’ Kwan, 53, a partner at a surgery in Sunderland, is seen in CCTV footage arriving at a Premier Inn in Newcastle wearing a heavy disguise  The GP, who wore a hat, tinted spectacles, gloves and a surgical mask, is seen checking into the hotel  Emergency services outside Kwan’s £300,000 home in Ingleby Barwick, Teesside, earlier this year  Police officers were seen carrying boxes of evidence away from the large property  Kwan getting out of his car (middle) after arriving at the underground car park in Newcastle on the day of the attempted murder  The GP, who carried a large bag, is seen making his way up the stairs Kwan forged NHS documentation to set up the home visit, disguised himself, used false number plates for the journey to Newcastle and booked in to a city centre hotel using a false name. Kwan’s mother, Jenny Leung, named Mr O’Hara in her will to the effect that he could stay in her house in St Thomas Street, Newcastle, should she die before her partner.A furious Kwan wrote to Mr O’Hara last November claiming to be a community nurse called Raj Patel and offered him a home visit.Mr Makepeace said: ‘As, I suspect, would any of us, Mr O’Hara fell for it hook, line and sinker, he had not the slightest suspicion that this was anything other than a genuine NHS community care initiative which he warmly welcomed and was grateful for.’Kwan was caught on CCTV checking into a Premier Inn in Newcastle wearing his disguise. He later went to his mother’s house in a long coat, flat cap, surgical gloves and wearing a medical mask and tinted glasses, and carried out a 45-minute examination on Mr O’Hara, and even checked his unsuspecting mother’s blood pressure when she asked.Kwan, in what the court heard was broken English with an Asian accent, told Mr O’Hara he needed a Covid booster, even though he had only had one three months ago.Mr O’Hara shouted in pain when it was administered and Kwan quickly packed his equipment and left, reassuring his victim that a reaction was not uncommon.The pain continued and Mr O’Hara began to suspect something had gone badly wrong.The next day his arm had blistered and was seriously discoloured and medics at hospital were baffled.He had developed the flesh-eating disease necrotising fasciitis and needed to have part of his arm cut away to stop it spreading, and spent several weeks in intensive care.The fake nurse’s movements were traced using CCTV and police were able to identify Kwan as a suspect.Searches of his home in the executive estate where he lived revealed an array of chemicals such as arsenic and liquid mercury as well as castor beans which can be used to make the chemical weapon ricin.  A close up of the doctor’s face as he was walking up the stairs without a mask om A heavily disguised Kwan walking into his room after checking in   He later walked across Newcastle and arrived at his mother’s home at around 10am, introducing himself as the expected nurse Police found a recipe for ricin on his computer but Ministry of Defence poisons expert Professor Steven Emmett, although still not sure which poison was used, thought iodomethane which is commonly used in pesticides, was more likely.Mrs Justice Lambert said she will sentence Kwan once the issue of his dangerousness has been considered by the Probation Service.She will sentence him on Thursday next week.The prosecution said their position remained that the case was financially motivated.Mrs Justice Lambert warned Kwan: ‘There will be a substantial custodial term.’Paul Greaney KC, defending, replied: ‘The defendant entirely understands that is inevitable.’Outside Newcastle Crown Court, Christopher Atkinson, head of the Complex Casework Unit for CPS North East, said: ‘Thomas Kwan went to highly unusual lengths in his attempts to kill his mother’s partner while avoiding detection.’Over several months, he obsessively planned a way of gaining access to his victim, which involved the use of counterfeit documents, a shell company and elaborate disguises to obscure the potentially lethal role he was to play in these events.’While the attempt on his victim’s life was thankfully unsuccessful, the effects were still catastrophic.’The chemical injected caused increasingly severe damage, beginning with burns and blisters around the injection site and progressing into a potentially life-threatening flesh-eating disease.’At a time when Kwan could have assisted medical staff by identifying this substance, he instead made no comment to the questions put to him in police interview, allowing the victim’s health to further deteriorate.’ A photo dated February 2024 showing emergency services outside Kwan’s home  A large forensic tent was erected in the garden of the property Mr Atkinson said the murder plot was ‘one of the most elaborate criminal plots in recent memory’.After the GP pleaded guilty, Detective Chief Inspector Jason Henry of Northumbria Police said: ‘Thomas Kwan’s actions were utterly despicable.’The detective praised Mr O’Hara, saying: ‘He has been through a horrendous ordeal, his life has changed for ever.’He has shown incredible strength throughout the investigation and we will continue to support him in any way we can.’The trial ground to a halt on Thursday after the prosecution had finished its opening summary of the evidence.The Crown had started to show a video interview with Mr O’Hara, filmed when he was still in hospital and wearing a gown.A technical problem with the video led to a break in proceedings, at which point Kwan spoke in private with his legal team, pleading guilty on Monday morning.It emerged during the trial that Kwan had developed alternative plans for if he did not go ahead with the fake nurse plot.Police found a document from the ‘Northern England Men Sporting Association’ addressed to ‘Patrick’ and offering him free drinks and ready meals through the post in recognition of his contributions to the North East throughout his working life.There was also a document he created, supposedly from the ‘Northern Wine and Drinks Tasting Gentlemen’s Club’ which the prosecution said hinted ‘at yet another method of delivery explored by Mr Kwan’.Kwan has been suspended by the General Medical Council since February.