Supreme Court begins manslaughter trial of Samuel Collins, 19, over death of David Alan Eldridge, 21, at Alberton Samuel Collins has been charged with manslaughter over the death of David Eldridge at Alberton in 2011. A 17-YEAR-OLD man put his sister's car into gear as she revved it, causing the car to hit and kill her boyfriend, a court has heard. The Brisbane Supreme Court on Thursday began hearing evidence into the trial of Samuel Collins, now 19, who has pleaded not guilty to one count of manslaughter over the death of David Alan Eldridge, 21, at Alberton on July 13, 2011. Collins has already pleaded guilty to one count of wilful damage. The court heard that Collins was staying at the home of his sister Brydee May Collins, then 19, at Varsity Lakes on the Gold Coast when Ms Collins and her live-in boyfriend, Mr Eldridge, began fighting. Mr Eldridge, who was on crutches at the time with plaster on his right leg due to a motorbike injury, called for his parents to come pick him up. The Eldridge family collected their son but about 10 minutes after arriving back at their home in Zipsf Road, Alberton, the Collins siblings and two friends arrived at the house. Prosecutor Glen Cash told the court the young couple's relationship was "tumultuous, punctured by fighting and arguments" and a dispute that night set off a "chain of events" that left Mr Eldridge dead. Mr Cash said Brydee Collins was "revving" the car outside the Eldridge home while it was in neutral gear. When her brother, in the passenger seat, changed the gear to drive, the vehicle "lurched forward" in a "rapid fashion" and struck and killed Mr Eldridge. Ms Collins then reversed over Mr Eldridge's body and drove away, Mr Cash said. The trial officially begun yesterday when the jury was selected. Terrance Eldridge, father of David Eldridge, who died at Alberton in 2011. In his opening submission today, Mr Cash advised the jury they would hear conflicting accounts from the witnesses about what happened that night. "It may not be easy for you to assemble a precise account," Mr Cash said. Mr Collins' lawyer, Craig Chowdhury, said in his opening submission it was not denied the then year 11 student changed the gear of the car. " (But) it is absolutely disputed by the defence that he did anything that makes him criminally responsible," he said. Giving evidence, Mr Eldridge's sister, Jodie-Lea Eldridge, said Ms Collins had "bashed" her on prior occasions and on that night was "bashing people at the front of the house" before she got in the car and David Eldridge was killed. "Within seconds she jumped in the car and just ran over David," she said. She told the court she heard Ms Collins say "I killed David" and her brother reply "just (expletive) go." Mr Eldridge's father, Terrance Allan Eldridge, told the court the situation outside his home was "volatile." He said he was less then three metres from his son when he was run down. Jodie-Lea Eldridge, sister of David Eldridge, who died at Alberton in 2011. It happened that fast. I just seen the light coming... I picked him up in my arms... I thought he was alive. David Eldridge died in his father's arms. Mr Eldridge told the court he ordered the Collins siblings to leave his property after his son was hit but the car stopped so they could retrieve a pet dog. I told them to get off my property, you've killed my son... they cared more about the dog. Mr Chowdhury asked why he told the court Ms Collins punched him in the face that night but did not put this in his police statement. I was in total shock (when I gave the statement). When your son's killed right in front of your eyes," he replied. Mr Chowdhury told Mr Eldridge and his daughter Jodie-Lea Eldridge the evidence they gave was not consistent with what they had told police when interviewed in the days following the death. Both said grief and shock had clouded their recall. Mr Chowdhury said Ms Eldridge's anger had "coloured" her evidence. Amanda Eldridge, sister of David Eldridge, who died at Alberton in 2011. I'm angry about the whole situation... I'm telling you the truth," she said Brydee May Collins - who was behind the wheel when the fatal incident occurred - broke down on the witness stand as she testified in her brother's trial. Mr Collins cried as he sat in the dock and watched his sister testify that she "had drunk quite a lot that night." She told the court she didn't see Mr Eldridge standing in the front yard when she swung the wheel to the right and hit him. She said for "some stupid reason" her foot was on the accelerator pedal as she turned around to put her dog into the back seat of the car and she didn't see her brother change the gear out of neutral. I assumed I had knocked it into gear as I turned around... I brushed straight past it, I felt it," she said. The court heard Ms Collins fought with Mr Eldridge's mother Suzanne and sister Lisa Marie Eldridge before she got in the car to drive away. Ms Collins will be cross examined on Friday when the trial resumes before Justice John Byrne.