Questions about the security services’ role in the attack on former President Donald Trump are mounting as new details come to light. According to an NBC affiliate, Police saw a suspicious man on the roof from which the shots were fired until half an hour before the shooting, at 18:45. This information raises questions about the effectiveness of the security measures implemented that day.

Kimberly Cheatle, director of the United States Secret Service, has confirmed that There were local agents inside the building from where the attacker, identified as Thomas Matthew CrucksCheatle said in an interview with ABC News that his department, which is responsible for protecting the former president, is investigating what happened. “It’s unacceptable and it’s something that should never happen again,” said Cheatle, who has refused to resign despite recent criticism.

The latest information reveals that Crucks reportedly purchased 50 rounds of ammunition the same morning of the attack. He also bought a ladder from a DIY store, although it is not yet clear whether it was the one he used to climb to the roof from which he fired.

Congress has subpoenaed Cheatle to testify on July 22, in an effort to clarify security flaws and ensure that corrective measures are implemented. The images and testimonies collected so far raise serious questions about the preparedness and response of law enforcement in such a high-risk event.