The FBI has been handed a potentially crucial recording that allegedly contains audio of the moment that Officer Darren Wilson opened fire and killed unarmed 18-year-old Michael Brown in Ferguson, Missouri, earlier this month. Revealed by CNN's Don Lemon on Monday, at least ten shots are heard to ring out during the background of the recording, with a brief but significant pause between the first seven shots and the last volley of four. The unidentified man who has given the unverified tape to authorities claims to have coincidentally recorded the fatal shots that killed Brown in broad daylight on August 9, and experts who have listened to the audio have said it could prove damning for Officer Wilson. Scroll Down for Audio . Attorney: Lopa Blumenthal is legally representing the man who claims to have coincidentally recorded the shooting of Michael Brown by Officer Darren Wilson on August 9 . 'There sounds like a pause in it (the audio). And when you hear that pause it brings some concern,' said retired Chief Deputy US Marshall Matthew Fog after listening on CNN. 'It is very significant, because if you have a pause there it means somebody had time to think and then fire again.' In the audio, the unidentified man is heard telling someone, 'You’re so pretty' then 11 gunshots can be heard to cackle in the background — seven in one volley, followed a pause and then a final burst of four. Lopa Blumenthal, the attorney for the unidentified man who recorded the alleged gunfire nearby said that she believed the audio shows, if it is authentic, that Officer Wilson had a clear 'point of contemplation' while pulling the trigger and aiming at Brown. 'He was in his apartment, talking to a friend on a video chat,' said Blumenthal. 'He heard loud noises, and at the time he didn't even realize the import of what he was hearing until afterwards, and it just happened to have captured 12 seconds of what transpired outside of his building.' Lemon cautioned that 'CNN cannot independent verify the authenticity of this tape' but did say that the FBI have interviewed both Blumenthal and her client. 'We had been told that at least six shots were fired at Michael Brown. In the tape that you have, which is alleged to be of the shooting—we can't independently authorize it, as CNN, because we did not shoot it, but there were more than six shots,' Lemon said. Nightly . scenes of unrest have erupted in Ferguson since Officer Darren Wilson . fatally shot Michael Brown, an unarmed black 18-year-old, more than two . weeks ago . Officer Darren Wilson (right, collecting a commendation) has claimed that a confrontation sparked by a scuffle with Michael Brown led to the Ferguson teens fatal shooting on August 9 (left, Wilson paces around the body of Brown in the aftermath of the shooting) while witnesses claim the officer continued to shoot at an unarmed man with his hands up who had surrendered . Funeral: The casket containing the remains of Michael Brown awaiting the start of his funeral inside the Friendly Temple Missionary Baptist Church, St Louis, Missouri, USA, on 25 August 2014 . Grief: Dorian Johnson, who is one of the key witnesses in the fatal police shooting of Michael Brown, leaves Brown's funeral at the Friendly Temple Missionary Baptist Church in St. Louis, Missouri, USA, on Monday, 25, August . If indeed the audio is genuine it calls into question the version of events that Officer Wilson and the Ferguson police force have claimed occurred on that Saturday afternoon. At least two autopsies performed on Michael Brown have concluded he died after being shot six times by Wilson after being pulled over by the officer, including a fatal 'kill shot' to the top of his head. Numerous witnesses, including Brown's friend Dorian Johnson, claim that Wilson opened fire after bungling opening his squad car door, causing the teen to run before turning back to face the officer with his hands raised saying 'don't shoot'. Johnson then alleges that Wilson continued to fire. Ferguson police and friends of Officer Wilson contend that Brown engaged in a scuffle with Wilson when the officer pulled him and Johnson over, tried to grab his weapon and then run towards him, leaving him no choice but to fire. Anguish: Michael Brown Sr., yells out as the casket carrying his son is lowered during the funeral service of Michael Brown in Normandy, Missouri on Monday, August 25, 2014 . Too much: Lesley McSpadden, Michael Brown's mother, cries during her son's funeral at the Friendly Temple Missionary Baptist Church, St Louis . Overcome: Lesley McSpadden appears overwhelmed with grief during the service . Laid to rest: A horse-drawn hearse carries Michael Brown to his gravesite at St. Peters Cemetery in Normandy, Missouri on Monday . Indeed in recent days reports had emerged stating that Wilson, 28, was badly beaten and left with serious facial injuries following the fatal shooting in the St Louis suburb, including an eye socket fracture. On Tuesday, The Gateway Pundit reported that the officer had suffered an 'orbital blowout fracture'. But CNN reported on Thursday that although the officer was taken to a hospital with a badly swollen face following the shooting on August 9, x-rays came back negative for any serious injury. Earlier reports had claimed that the officer was almost knocked unconscious by Brown's blows, according to the source. A police source told Fox: 'The Assistant (Police) Chief took him to the hospital, his face all swollen on one side. He was beaten very severely.' Demonstrators protest the shooting death of Michael Brown in Ferguson, Missouri, last Thursday night . The source continued: 'They ignored him [Wilson] and the officer started to get out of the car to tell them to move. They shoved him right back in, that’s when Michael Brown leans in and starts beating Officer Wilson in the head and the face.' A police source has confirmed to MailOnline that Wilson was taken to hospital and treated for facial injuries sustained during the Brown incident but would not elaborate on the severity or nature of those injuries. Last week, Ferguson Police Chief Thomas Jackson said Wilson had suffered swelling to the side of his face but gave few details of the injuries. Wilson, a six-year veteran of the Ferguson force with a clean record, has not been arrested or charged with any crime. He is on paid leave pending the outcome of the investigation and is under 24-hour guard after death threats were aimed at him. Wilson is 'traumatized, scared for his life and his family' along with being deeply concerned that a grand jury, which met for the first time on Wednesday, will make an example out of him, the source told Fox. Earlier reports had claimed that Officer Wilson was almost knocked unconscious by Brown's blows . Missouri Governor Jay Nixon has come under fire after calling for the 'vigorous prosecution' of Wilson despite the fact that the officer has not yet been charged with any crime. His deputy, Missouri Lieutenant Governor Peter Kinder said: 'It's really heartbreaking to see a man elected to an office that high in our state government... come out with a statement like that, that does prejudge the case.' St Louis County Prosecutor Robert McCulloch said on Wednesday he estimated it would be the middle of October before the grand jury reached a decision on whether Officer Wilson will face charges over Michael Brown's death. Gov. Jay Nixon on Thursday ordered the Missouri National Guard to begin withdrawing from Ferguson. Since the guard's arrival Monday, flare-ups in the small section of town that had been the center of nightly unrest have begun to subside. About 100 people gathered Thursday evening, walking in laps near the spot where Michael Brown was shot. Some were in organized groups, such as clergy members. More signs reflected calls by protesters to remove the prosecutor from the case.
Newly released audio allegedly records the moment that Officer Darren Wilson opened fire on unarmed Michael Brown .
At least ten shots can be heard - in two separate volleys of gunfire .
Experts have said this indicated a 'moment of contemplation' for Wilson .
FBI has confirmed it has interviewed the man who recorded audio .
Is another tantalizing piece of evidence collected in the ongoing case .
Officer Wilson claims he felt his life was threatened on August 9 .
Witnesses and a friend of Brown, 18, claim he had surrendered .
Brown was buried on Monday in a ceremony attended by thousands .
The FBI has been handed a potentially crucial recording that allegedly contains audio of the moment that Officer Darren Wilson opened fire and killed unarmed 18-year-old Michael Brown in Ferguson, Missouri, earlier this month. Revealed by CNN's Don Lemon on Monday, at least ten shots are heard to ring out during the background of the recording, with a brief but significant pause between the first seven shots and the last volley of four. The unidentified man who has given the unverified tape to authorities claims to have coincidentally recorded the fatal shots that killed Brown in broad daylight on August 9, and experts who have listened to the audio have said it could prove damning for Officer Wilson. Scroll Down for Audio . Attorney: Lopa Blumenthal is legally representing the man who claims to have coincidentally recorded the shooting of Michael Brown by Officer Darren Wilson on August 9 . 'There sounds like a pause in it (the audio). And when you hear that pause it brings some concern,' said retired Chief Deputy US Marshall Matthew Fog after listening on CNN. 'It is very significant, because if you have a pause there it means somebody had time to think and then fire again.' In the audio, the unidentified man is heard telling someone, 'You’re so pretty' then 11 gunshots can be heard to cackle in the background — seven in one volley, followed a pause and then a final burst of four. Lopa Blumenthal, the attorney for the unidentified man who recorded the alleged gunfire nearby said that she believed the audio shows, if it is authentic, that Officer Wilson had a clear 'point of contemplation' while pulling the trigger and aiming at Brown. 'He was in his apartment, talking to a friend on a video chat,' said Blumenthal. 'He heard loud noises, and at the time he didn't even realize the import of what he was hearing until afterwards, and it just happened to have captured 12 seconds of what transpired outside of his building.' Lemon cautioned that 'CNN cannot independent verify the authenticity of this tape' but did say that the FBI have interviewed both Blumenthal and her client. 'We had been told that at least six shots were fired at Michael Brown. In the tape that you have, which is alleged to be of the shooting—we can't independently authorize it, as CNN, because we did not shoot it, but there were more than six shots,' Lemon said. Nightly . scenes of unrest have erupted in Ferguson since Officer Darren Wilson . fatally shot Michael Brown, an unarmed black 18-year-old, more than two . weeks ago . Officer Darren Wilson (right, collecting a commendation) has claimed that a confrontation sparked by a scuffle with Michael Brown led to the Ferguson teens fatal shooting on August 9 (left, Wilson paces around the body of Brown in the aftermath of the shooting) while witnesses claim the officer continued to shoot at an unarmed man with his hands up who had surrendered . Funeral: The casket containing the remains of Michael Brown awaiting the start of his funeral inside the Friendly Temple Missionary Baptist Church, St Louis, Missouri, USA, on 25 August 2014 . Grief: Dorian Johnson, who is one of the key witnesses in the fatal police shooting of Michael Brown, leaves Brown's funeral at the Friendly Temple Missionary Baptist Church in St. Louis, Missouri, USA, on Monday, 25, August . If indeed the audio is genuine it calls into question the version of events that Officer Wilson and the Ferguson police force have claimed occurred on that Saturday afternoon. At least two autopsies performed on Michael Brown have concluded he died after being shot six times by Wilson after being pulled over by the officer, including a fatal 'kill shot' to the top of his head. Numerous witnesses, including Brown's friend Dorian Johnson, claim that Wilson opened fire after bungling opening his squad car door, causing the teen to run before turning back to face the officer with his hands raised saying 'don't shoot'. Johnson then alleges that Wilson continued to fire. Ferguson police and friends of Officer Wilson contend that Brown engaged in a scuffle with Wilson when the officer pulled him and Johnson over, tried to grab his weapon and then run towards him, leaving him no choice but to fire. Anguish: Michael Brown Sr., yells out as the casket carrying his son is lowered during the funeral service of Michael Brown in Normandy, Missouri on Monday, August 25, 2014 . Too much: Lesley McSpadden, Michael Brown's mother, cries during her son's funeral at the Friendly Temple Missionary Baptist Church, St Louis . Overcome: Lesley McSpadden appears overwhelmed with grief during the service . Laid to rest: A horse-drawn hearse carries Michael Brown to his gravesite at St. Peters Cemetery in Normandy, Missouri on Monday . Indeed in recent days reports had emerged stating that Wilson, 28, was badly beaten and left with serious facial injuries following the fatal shooting in the St Louis suburb, including an eye socket fracture. On Tuesday, The Gateway Pundit reported that the officer had suffered an 'orbital blowout fracture'. But CNN reported on Thursday that although the officer was taken to a hospital with a badly swollen face following the shooting on August 9, x-rays came back negative for any serious injury. Earlier reports had claimed that the officer was almost knocked unconscious by Brown's blows, according to the source. A police source told Fox: 'The Assistant (Police) Chief took him to the hospital, his face all swollen on one side. He was beaten very severely.' Demonstrators protest the shooting death of Michael Brown in Ferguson, Missouri, last Thursday night . The source continued: 'They ignored him [Wilson] and the officer started to get out of the car to tell them to move. They shoved him right back in, that’s when Michael Brown leans in and starts beating Officer Wilson in the head and the face.' A police source has confirmed to MailOnline that Wilson was taken to hospital and treated for facial injuries sustained during the Brown incident but would not elaborate on the severity or nature of those injuries. Last week, Ferguson Police Chief Thomas Jackson said Wilson had suffered swelling to the side of his face but gave few details of the injuries. Wilson, a six-year veteran of the Ferguson force with a clean record, has not been arrested or charged with any crime. He is on paid leave pending the outcome of the investigation and is under 24-hour guard after death threats were aimed at him. Wilson is 'traumatized, scared for his life and his family' along with being deeply concerned that a grand jury, which met for the first time on Wednesday, will make an example out of him, the source told Fox. Earlier reports had claimed that Officer Wilson was almost knocked unconscious by Brown's blows . Missouri Governor Jay Nixon has come under fire after calling for the 'vigorous prosecution' of Wilson despite the fact that the officer has not yet been charged with any crime. His deputy, Missouri Lieutenant Governor Peter Kinder said: 'It's really heartbreaking to see a man elected to an office that high in our state government... come out with a statement like that, that does prejudge the case.' St Louis County Prosecutor Robert McCulloch said on Wednesday he estimated it would be the middle of October before the grand jury reached a decision on whether Officer Wilson will face charges over Michael Brown's death. Gov. Jay Nixon on Thursday ordered the Missouri National Guard to begin withdrawing from Ferguson. Since the guard's arrival Monday, flare-ups in the small section of town that had been the center of nightly unrest have begun to subside. About 100 people gathered Thursday evening, walking in laps near the spot where Michael Brown was shot. Some were in organized groups, such as clergy members. More signs reflected calls by protesters to remove the prosecutor from the case.
moment that Officer Darren Wilson opened fire and by CNN's Don Lemon on Monday, at least ten shots experts who have listened to the audio have said legally representing the man who claims to have Brown by Officer Darren Wilson on August 9 . gunshots can be heard to cackle in the background attorney for the unidentified man who recorded Wilson had a clear 'point of contemplation' while unarmed man with his hands up who had surrendered occurred on that Saturday afternoon. At least two friend Dorian Johnson, claim that Wilson opened Officer Wilson contend that Brown engaged in a A police source has confirmed to MailOnline that near the spot where Michael Brown was shot. Some