Investigators are also working to determine if the agent was looking in the suspect’s direction because shots were fired or if it was because he saw the barrel of the gun, according to sources.

On Sunday night, sources told ABC News that the person in the woods in position to shoot at former President Trump may have done surveillance and had some information about his movements.

According to sources familiar with Trump’s internal calendar, Trump’s decision to head to the golf course on Sunday was a last-minute one and had not been publicized.

Trump had been golfing with his longtime friend and donor Steve Witkoff at the time gunshots were heard, sources familiar with the matter told ABC News.

A Republican who spoke with Trump shortly after the incident told ABC News that Trump said he was near the 5th hole of the Trump International golf course when he heard “popping sounds” in the vicinity. The source said Trump was in “good spirits.”

Following the shots fired, sources said Trump was immediately rushed to a safe area on the grounds of the golf course.

The sheriff said the golf course was not surrounded by law enforcement because Trump is not the sitting president. “If he was, we would have had this entire golf course surrounded. But because he’s not, security is limited to the areas that the Secret Service deems possible. So, I would imagine that the next time he comes to the golf course, there’ll probably be a little bit more people around the perimeter.”