Glen Turner, his wife Alison McKenzie and their children Jack and Alexandra. Credit:Tracy Fulford Photography The Crown Prosecutor Pat Barrett did not accept the manslaughter plea, telling the court Mr Turnbull was motivated by a "personal hatred of Mr Turner" and the belief he and his family were being persecuted by government authorities over land clearing. In his opening address to the jury Mr Barrett said the accused and the victim knew each other, as Mr Turner had been investigating illegal land clearing on properties owned by Mr Turnbull's son Grant and grandson Cory since 2011. Mr Turner and Mr Strange were employed as compliance officers for the Office of Environment and Heritage and had travelled from their Tamworth base to Moree on the day of the incident. They stopped outside the Turnbull family's properties after spotting fires, presumed to be the burning of illegally cleared native vegetation. While they stopped to take pictures and video evidence, Mr Turnbull, having been tipped off to the officers' presence by an employee, drove up and parked behind their ute. He got out of his car and without warning fired a shotgun, hitting Mr Turner in the neck and chin. Mr Turner fell to his knees and began to bleed heavily before getting up and hiding behind his car.

The scene of the fatal shooting inTalga Lane, Croppa Creek, near Moree on July 30, 2014. Credit:Moree Champion Mr Strange will give evidence that over the next 40 minutes he repeatedly pleaded for Mr Turnbull to allow him to get his injured colleague medical help. Mr Turnbull allegedly said Mr Turner was "ruining the Turnbulls" and "continuing to harass us and taking us to court". Ian Turnbull's wife Robeena Turnbull at the NSW Supreme Court in October 2014. Credit:Louise Hall Mr Strange will say he told Mr Turnbull: "Enough is enough, we are only doing our jobs" to which Mr Turnbull allegedly replied: "He isn't letting us do our jobs" and "I'll kill him and that will stop him".

As Mr Turner darted around the cars another two shots were fired, one hitting him in the chest. He then made a run for it and was shot in the back, level with his heart. He could not be revived. Glen Turner and his wife Alison McKenzie. Credit:Tracy Fulford Photography Mr Turnbull drove off, allegedly telling Mr Strange: "You can go now, I'll be home waiting for the police". That evening he allegedly told a friend: "I had no choice, he was ruining my family and it was never going to end". Mr Barrett said the Crown case is that at the time Mr Turnbull intended to kill Mr Turner. He told the jury of eight men and four women it would be for them to decide if Mr Turner had any impairment and if it was enough to reduce his culpability from murder to manslaughter.

In his opening address Mr Turnbull's barrister Todd Alexis SC said his client was a life-long farmer who has well-regarded in the community and had no history of violence. He said the various family properties supported his extended family including four sons and the prosecutions being bought by the authorities in the Land and Environment Court caused him significant stress and he was suffering from a "major depressive illness". Mr Alexis said there would be evidence about the manner in which Mr Turner dealt with the Turnbulls and various farm workers regarding the subject of compliance as well as evidence about the nature of Mr Turner's surveillance activities. He told the jury they would be asked to consider whether Mr Turner "wore him down and caused him to ultimately lose self-control and snap". The trial before Justice Peter Johnson continues.