Love triangle turns deadly as chef stabs romantic rival to death on his rural NSW property and makes a shock admission to cops: 'I'm an idiot'

By CAITLIN POWELL - NEWS REPORTER Published: 01:14, 2 July 2026 | Updated: 01:23, 2 July 2026 A former chef has been found guilty of manslaughter after he fatally stabbed the husband of a woman he was having an affair with during a confrontation. Robert Marshall, 43, returned to his rural property at Bungonia, near Goulburn in New South Wales, in March 2024 after finishing a shift when he was confronted by Adam Cordingley. Following an altercation, Marshall stabbed the father-of-four with a hunting knife and called police. Bodycam footage, published by Nine News, shows Marshall admitting to a love triangle involving himself, Mr Cordingley and Mr Cordingley's wife.  'I had an affair with his wife. That was like nine months ago,' he told officers. When an officer asked whether the situation was still raw, Marshall replied: 'Yeah.'  His interview with police, which lasted an hour, also revealed further details of the incident.  'I had no intentions of stabbing him. I'm a f***ing idiot,' Marshall told officers. Robert Marshall (pictured) was found guilty of manslaughter after he stabbed a romantic rival Marshall told officers during his arrest that he had returned to his rural property at Bungonia, near Goulburn, after work in March 2024 and was confronted by Adam Cordingley Mr Cordingley (pictured) questioned Marshall about the details of an affair he had with Mr Cordingley's wife nine months prior Marshall claimed Mr Cordingley waited for him at his home and began to question him about the affair. 'So then he started asking questions about what was happening with the affair and all that sort of stuff, how many times we'd had sex,' he told officers. 'Started walking back towards the house and that's when he ran up and started punching into me. 'He probably got three or four more blows into my head.' Marshall said Mr Cordingley then said: 'Did you stab me?' During his trial in the NSW Supreme Court, Marshall claimed he could not remember using the knife and argued he acted in self-defence.  He was acquitted of murder but found guilty of manslaughter. He will next appear in court for a sentencing hearing in September.  No comments have so far been submitted. Why not be the first to send us your thoughts, or debate this issue live on our message boards. By posting your comment you agree to our house rules. Do you want to automatically post your MailOnline comments to your Facebook Timeline? Your comment will be posted to MailOnline as usual. Do you want to automatically post your MailOnline comments to your Facebook Timeline? Your comment will be posted to MailOnline as usual We will automatically post your comment and a link to the news story to your Facebook timeline at the same time it is posted on MailOnline. To do this we will link your MailOnline account with your Facebook account. We’ll ask you to confirm this for your first post to Facebook. You can choose on each post whether you would like it to be posted to Facebook. Your details from Facebook will be used to provide you with tailored content, marketing and ads in line with our Privacy Policy.