On Sunday, unsettling details emerged about the gunman who attempted to breach the White House Correspondents’ Dinner. The incident, which included the shooting of a Secret Service agent, occurred as the prestigious event unfolded with President Trump and other administration officials present.

On Monday, 31-year-old Cole Thomas Allen is set to appear in court for his alleged actions during the gathering. This high-profile incident has prompted law enforcement to delve into Allen’s background for potential warning signs that might have been overlooked.

In conversations with Allen’s siblings, investigators have uncovered indications that the family may have been aware of his troubling behavior. A law enforcement source, speaking to The Daily Mail, mentioned that concerns were indeed noted by his relatives. “We’re assessing the situation carefully to determine if there were missed signals, especially given some of his past rhetoric,” the source explained.

Adding to the gravity of the investigation, Allen’s brother provided authorities with a manifesto penned by Allen. This document was handed over to the New London, Connecticut Police Department shortly after the shooting incident.

The source further commented on the broader implications of the case, noting, “We’re operating in a highly charged environment. Social media is rife with commentary about the current state of affairs, which complicates distinguishing between rhetoric and genuine threats.”

‘The problem is we’re in such a charged climate. I mean, there’s a lot of commentary on social media just about the state of affairs,’ the source told The Daily Mail. 

‘Trying to figure out, when a family member becomes concerned, how to encourage them to report it so things like this don’t happen.’

While they continue investigating Allen’s motivations, they know that he had attended a ‘No Kings’ rally and are concerned about potential copycats.

The official said that they’re looking into what can be done differently in the future to identify possible shooters.   

Cole Thomas Allen (pictured), the 31-year-old man set to be charged with attempting to shoot up the White House Correspondents’ Dinner, left warning signs ahead of the incident ignored by those close to him

Trump is escorted out after a man opened fire with a shotgun on security personnel outside the room

‘It’s hard because there is a lot of emotionally charged things going on right now, and people are certainly voicing some of the frustration online and on social media, and sometimes it crosses the line to hateful speech,’ the official said. 

‘But it’s kind of like using a teaspoon to measure the ocean.’

Both Allen’s brother and sister were concerned about his ‘increasingly agitated rhetoric’ in his writings.  

They noted that he was empathetic toward transgender people and against the Iran War but he was unhappy about several issues and not one specifically.  

Allen, who has no criminal record, may have scheduled sending his manifesto based on how it was written.  

‘It appears as though he didn’t know if he was going to be around,’ they said. 

They are not yet clear on any past drug use or mental health issues displayed by Allen. 

Allen called himself the ‘Friendly Federal Assassin’ in a chilling manifesto he wrote before the attack. 

He sent the eerie anti-Trump writing to his family members just 10 minutes before he fired shots at the hotel in Washington, where the ritzy press gala was taking place on Saturday night. 

Guests take cover after U.S. President Donald Trump and first lady Melania Trump were rushed out

Trump spoke in the White House Press Briefing room hours after the attack

The harrowing writing was given to the police by a relative, a US official said. 

According to the New York Post, Allen’s manifesto read: ‘Turning the other cheek is for when you yourself are oppressed. I’m not the person raped in a detention camp. I’m not the fisherman executed without trial.

‘I’m not a schoolkid blown up or a child starved or a teenage girl abused by the many criminals in this administration. Turning the other cheek when *someone else* is oppressed is not Christian behavior; it is complicity in the oppressor’s crimes.

‘In order to minimize casualties, I will also be using buckshot rather than slugs (less penetration through walls). 

‘I would still go through most everyone here to get to the targets if it were absolutely necessary (on the basis that most people *chose* to attend a speech by a pedophile, rapist, and traitor, and are thus complicit) but I really hope it doesn’t come to that.’

His targets included ‘administration officials (not including [FBI Director Kash] Patel): they are targets, prioritized from highest-ranking to lowest.’

Allen wrote, allegedly referencing the president: ‘I am no longer willing to permit a pedophile, rapist, and traitor to coat my hands with his crimes.’

Trump spoke out on Sunday morning, following the chaotic night at the dinner.

A photo of Allen as a student at Cal-Tech in 2017

The Washington Hilton is also where a man attempted to kill President Ronald Reagan

He told Fox that the shooter ‘had a lot of hatred in his heart’ and that religion was a reason why the gunman attacked. 

The President said this morning: ‘He had a lot of hatred in his heart for quite a while.’

He added that the manifesto was ‘a religious thing. It was strongly anti-Christian.’

‘He’s got some big problems with the rest of his life, but it’s very, very bad, very bad situation,’ the President continued.

Allen, a teacher from Torrance, California, had a manifesto, and his siblings knew he had firearms and were worried about him.

On Saturday night, chilling surveillance footage captured the moment gun-wielding Allen stormed past security at the White House Correspondents’ Dinner.

Allen was seen wearing all black as he sprinted inside the Washington Hilton hotel on Saturday evening with a gun in hand, video posted by President Trump on Truth Social showed.

Just moments before he ran, security guards were seen standing in the hallway, but as soon as he sped by, they immediately reacted and pulled out their firearms.

Allen, who has no criminal record, may have scheduled sending his manifesto based on how it was written

Members of the FBI walk to inspect the neighbourhood where the house associated with Cole Tomas Allen

Police revealed the suspect had a number of weapons on him, including a shotgun, a handgun, and multiple knives.

President Trump shared a stunning image shortly after the shooting, showing the suspect shirtless and lying face down on the carpet.

Law enforcement confirmed he was not struck by gunfire while being stopped, but has since been taken to the hospital for evaluation.

Allen was a guest at the Hilton hotel, where the event was taking place.

Surveillance video shows the suspect sprinting past a security checkpoint and attempting to reach the doors to the ballroom where the president was gathered, along with his most senior cabinet members and thousands of journalists.

Evidence found on Allen’s electronic devices and in his writings points towards the theory that he intended to target administration members in attendance at the dinner.

His family members told law enforcement that Allen had sent them some of his disturbing writings before the attack, which prompted one of them to alert police. The writings did not specifically mention the dinner on Saturday.

Another family member told investigators that Allen has made radical statements and that he frequently mentioned plans to do ‘something’ to fix problems with today’s world.

The family added that Allen would regularly visit a shooting range to train with his guns. A senior US official told CBS News that the suspected gunman was part of a group called The Wide Awakes and that he attended a No Kings protest in California.