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I personally don’t think we’re ever going to be satisfied with the why, said John Sheahan, a former sergeant and SWAT team officer with the Las Vegas Metropolitan Police Department. We're talking about someone who has never had a lot of friends, kept to himself, and had all the finances in the world to do what he was going to do. Since the shooting, The FBI and police investigators have interviewed hundreds of witnesses, including Paddock's girlfriend Mary Lou Danley. They also looked into his gun buying history, taken apart his computer and even sent his brain to Stanford University for detailed forensic examination. But in recent weeks, authorities have provided little to no insight into the status of their investigation. The FBI’s Las Vegas field office did not respond to Fox News ’ request for an interview while the Las Vegas Metropolitan Police Department declined to take part in one. When we have more information to provide, we will let everybody know, LVMPD Officer Larry Hadfield told Fox News. But John Sheahan warns there may never be new information to release. Police investigators want to give the public answers. It takes the monkey off your backs.