The judge in the murder trial of Oscar Pistorius said Friday that she will give a verdict on Sept. Derrius Guice Jersey . 11, bringing closer to an end a globally televised five-month trial that has transfixed South Africans and others around the globe. Judge Thokozile Masipa made the announcement after the prosecution and defence ended their final arguments. Masipa will decide with the help of two legal assistants if the double-amputee athlete faces prison for killing Reeva Steenkamp on Valentines Day last year in his home. If found guilty of premeditated murder, Pistorius could face 25 years and up to life in prison. Pistorius said he mistakenly shot Steenkamp through the closed door of a toilet cubicle, thinking there was an intruder in his home. The prosecution alleges the world-famous runner intentionally killed her after an argument. "The accused intended to kill a human being," chief prosecutor Gerrie Nel said at the very end of closing arguments. "There must be consequences." Nel has urged the judge to dismiss Pistorius entire story as an elaborate lie and to convict him of premeditated murder. South Africa does not have trial by jury, nor does it have the death penalty. Pistorius could also be convicted of a lesser murder charge or negligent killing, both of which call for years in jail. Judge Masipa could acquit him if she believes he only made a tragic error. In the prosecutions final arguments, Nel accused the once-celebrated Paralympic champion of being an "appalling witness" who was constantly "deceitful" during his testimony to try to cover up a murder after a fight between the couple. Pistorius, 27, sat on the bench Friday behind his lawyer, the same place he has spent every one of the 41 days of proceedings. He wore glasses, mostly looking straight ahead. Chief defence lawyer Barry Roux argued the killing was an accident and said Pistorius disability had made him particularly vulnerable and anxious about crime over the years, comparing him to a victim of abuse who kills an abuser after a long period of suffering. Pistorius had his lower legs amputated as a baby, and Roux said that the athletes long-held fear of being attacked with the disability played a central role in the shooting on Feb. 14, 2013. At one point Friday, Roux slammed his hand down onto a desk in the Pretoria courtroom to mimic a sudden sound he says the disabled athlete heard during the fatal night, startling him and causing him to fire four shots. "Youre anxious. Youre trained as an athlete to react ... He stands now with his finger on the trigger ready to fire," Roux said, describing the highly fearful mindset he says Pistorius was in when he killed Steenkamp by mistake thinking she was a dangerous intruder. "He stands there and ..." Roux continued before suddenly hitting the wood surface in front of him to create a loud thump sound, arguing Pistorius fired on "reflex." The judge watched from her seat up on a dais. Pistorius pleaded not guilty to the main murder charge and also three separate firearm charges. Roux, however, conceded that he was guilty in one of those firearm charges, of negligently firing a gun in a public place in an incident in a restaurant weeks before the killing. Prosecutors have used those firearm charges to paint Pistorius as a hothead who was obsessed with guns, not the vulnerable figure his defence puts forward. Referring to some of the defences arguments already submitted to the court in a 243-page document, Roux said there were contradictions in testimony by some neighbours who said they heard a woman screaming on the night that Pistorius shot Steenkamp, suggesting a fight. Roux said high-pitched screams came from Pistorius as he called for help after the shooting, and that the athletes timeline of the sequence of events, including telephone calls, on the night of the shooting matched the testimony of key trial witnesses. Roux also alleged that items in Pistorius bedroom, near the bathroom where he killed Steenkamp, may have been moved around by investigating officers, repeating the defences allegation that police tampered with evidence, albeit unintentionally. "There was no respect for the scene," Roux said of the police investigation. The positioning of bedroom items, including a fan, a bedcover and a pair of Steenkamps jeans, are important because, in police photographs, they were not in the places where Pistorius said they were before the shooting. Prosecutors have used this to argue Pistorius is lying to hide a murder. Orlando Scandrick Jersey . -- Michael Phelps is 0 for 1 in his comeback to the pool. Jonathan Allen Jersey . 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