Note left by Vegas killer shows he was an experienced shooter October 8, 2017Las Vegas mass murdered Stephen Paddock. (Courtesy of Eric Paddock via AP) (Courtesy of Eric Paddock via AP)Note left by Vegas killer shows he was an experienced shooterThe latest development in the Las Vegas mass shooting generates yet more questions about Paddock’s motives. Investigators believe a note found in the Las Vegas gunman’s hotel room contained a series of numbers that helped him calculate more precise shots, a law enforcement official said.A law enforcement official told The Associated Press on Saturday that the numbers found on a note located on a nightstand included the distance between the high-rise hotel room that Stephen Paddock was using as a perch and the concert below.The official wasn’t authorized to discuss the details of the ongoing investigation publicly and spoke on condition of anonymity.Investigators are still working to determine why Paddock committed the deadliest mass shooting in modern US history.On Friday, FBI agents announced plans to put up billboards throughout Las Vegas to ask people with credible information to call with tips.Vice President Mike Pence appeared at a prayer service in Las Vegas on Saturday to mourn the victims of last weekend’s concert shooting and to praise those who risked their lives to save others.Federal officials also began hauling away thousands of personal items left behind in the concert venue after Paddock unleashed a fury of gunfire from his Mandalay Bay hotel room, killing 58 people and injuring nearly 500.By: AP FBILas VegasStephen Paddock