The newspaper recalls that about 20-25 minutes before the shooting, security forces responsible for combating snipers noticed Crooks' strange behavior and sent his photo to the command center.
Earlier, Trump expressed bewilderment that the person who shot him at a rally in Pennsylvania could not be prevented from getting to the roof of the building from which he opened fire.
On July 13, a gunman attempted to assassinate Trump during a campaign rally in Pennsylvania, but Trump evaded death by tilting his head at the last second and only sustained a wound to his right ear.
The gunman, Thomas Crooks, killed a member of the audience and injured two others before the US Secret Service sniper team eliminated him.
The incident prompted US Secret Service Director Kimberly Cheatle to resign.