An Auckland teenager who shot four other young men last year at the apex of a prolonged feud that started over a girl has admitted guilt just weeks ahead of his scheduled murder trial.  Newly released court documents state the family of defendant Kayden Stanaway had been terrorised in the months leading up to the September 2024 shootings. But Stanaway also lashed out, threatening at one point to kidnap the father of 18-year-old Maxwel-Dee Repia, who would die just hours later.  Stanaway, now 20, returned to the High Court at Auckland this morning for the arraignment on one count of murder and three counts of wounding with intent to cause grievous bodily injury.  The quadruple shooting has now been deemed to have been in self-defence, although so excessive as to be illegal, according to the agreed summary of facts for his case.  Stanaway fatally shot Repia and seriously injured Repia’s mates outside the defendant’s family home in Grey Lynn on the evening of September 5 last year, hours after Repia and others threw rocks at the house, smashing a window.  “The feud between the complainant group and Mr Stanaway began in early 2024 when Mr Stanaway began a relationship with the ex-girlfriend of a friend of the complainant group,” court documents state.  Kayden Stanaway appears in Auckland District Court in September 2024 for his first appearance following the fatal shooting of Maxwel-Dee Repia in Grey Lynn. Photo / Michael Craig  It ended with what appeared to be four carefully aimed shots.  “Mr Stanaway adopted a standing firing stance by resting his elbows on the roof of the Mazda vehicle and taking aim with the firearm at Mr Repia’s group across the road,” according to the agreed facts.  History of animosity  Stanaway and Repia appeared to have made permanent enemies of each other sometime in early 2024, when Repia attempted to punch the defendant through a car window, the agreed facts state. The two teens squared off on that occasion but didn’t end up fighting.  The next documented confrontation happened in late February that year, when a 13-year-old friend of the defendant was allegedly beaten up and robbed by Repia and his associates. Stanaway and his associates retaliated by doing the same to one of Repia’s friends.  Stanaway claimed to authorities that on St Patrick’s Day that year, Repia and some others showed up at his home, initially threatening to shoot his 13-year-old sister. When Stanaway and his father confronted the group, armed with a hammer and a crowbar, Stanaway claimed that Repia again escalated the situation.  Maxwel-Dee Repia was fatally shot in Grey Lynn, Auckland, in September 2024. Photo / Supplied  “Mr Stanaway’s account is that Mr Repia pulled out the apparent firearm and pointed it at Mr Rama-Manga’s head, pulling the trigger,” court documents state. “The gun made a clicking sound but no bullets were released.”  Police, however, were never called.  Two weeks later, the defendant claimed, Repia and his associates showed up at the home around 1am “armed with a crowbar and ready for a fight”. They allegedly smashed windows to the house and to Stanaway’s car, tagging it with spray paint.  “Mr Repia and others attempted to enter the house through the front door; however, Mr Stanaway, his father and his cousin were able to hold the door closed and prevent their entry,” court documents state.  Police were later called to report the damage. A short time later, a fragile truce between the two groups was reached.  But animosity reignited four-and-a-half months later, in mid-August, when Repia and his associates allegedly forced their way into Stanaway’s family home and confronted his father and 17-year-old sister. Stanaway was not home, but the group demanded the keys to his new motorbike, the agreed facts state.  The intruders were holding bottles as weapons, Stanaway’s father would later recount. As they...