Dramatic bodycam footage of an officer shooting dead a man with a history of mental illness after he pointed a gun at him earlier this month as been released. The video shows Donald Allen, 66, pointing a loaded, 22-caliber pistol at officer Brian Barnett on April 11. Barnett, 25. then shoots Allen dead after he comes at him with the gun, making threatening statements as he does.WARNING: Graphic content . Bodycam footage released this week shows a police officer in Sand Springs, Oklahoma, fatally shooting a man . The bodycam footage shows Donald Allen, 66, pointing a loaded, 22-caliber pistol at officer Brian Barnett, 25 . The camera was malfunctioning and it was thought the video was lost. It was recovered but the audio was not . Deputy Chief of Police Mike Carter played the video at a news conference on Tuesday, Tulsa World reported. The camera was malfunctioning and it was initially thought the video was lost. It was forensically recovered, but the audio from the bodycam was not, Fox 23 reported. Carter said: 'We are faced with making decisions that other people normally are not faced with making. 'This officer had to make one of those decisions that day. 'By this video, I think it very clearly shows he made a good decision. 'He made the decision he had to make. 'Don't ever confuse that with a decision that we want to make.' He said he believes the shooting was justified. Barnett shot four times. Officers in Sand Springs have been wearing bodycams for the past seven years and the early April incident was the first officer-involved shooting in 17 years in the town. Allen, a Vietnam veteran, was shooting a gun in his backyard when police were called, according to News on 6. His wife told police he was a paranoid schizophrenic and had been off his medication for a year. Deputy chief Carter added: 'Mr Allen is a victim. 'He's a victim of mental illness, he's a victim of the system. 'This was a tragic incident. 'It's something we hope we are never placed in the position of happening again.' All the recordings have been turned over to the Tulsa County District Attorney's Office. Barnett remains on administrative leave pending an investigation by the Tulsa County DA. Deputy chief Mike Carter said: 'It's something we hope we are never placed in the position of happening again'
Police officer in Sand Springs, Oklahoma, shot Donald Allen on April 11 .
Brian Barnett, 25, killed Allen, 66, after man made threatening statements .
Bodycam footage showed Allen advancing with loaded, 22-caliber pistol .
Sand Springs Police Department turned findings over to Tulsa County DA .
Video was released after being recovered from a malfunctioning camera .