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 today that the numbers found on a note located on a nightstand included the distance between the high-rise hotel room that Paddock was using as a perch and the concert below.
Investigators are still working to determine why Paddock committed the deadliest mass shooting in modern US history.
Yesterday, FBI agents announced plans to put up billboards throughout Las Vegas to ask people with credible information to call with tips.
Federal officials also began hauling away thousands of personal items left behind in the concert venue after Stephen Paddock unleashed a fury of gunfire from his Mandalay Bay hotel room, killing 58 people and injuring nearly 500.