A Known Threat at the Gate: How Nasire Best Slipped Through the System and Opened Fire at the White House

On a Saturday evening in late May, with President Donald Trump inside the Executive Residence, a 21-year-old man walked up to a Secret Service checkpoint at 17th Street and Pennsylvania Avenue NW, pulled a gun from a bag, and began shooting at posted officers. Within seconds, agents returned fire. Within minutes, the suspect — later identified as Nasire Best of Maryland — was on the ground, fatally wounded. A civilian bystander was also struck and rushed to a hospital in critical condition [1][2][3].

The White House was locked down at approximately 6:00 p.m. ET. It was lifted at 6:46 p.m. [4]. Trump was unharmed. No Secret Service officers were hit [2].

The facts that emerged in the hours and days after the May 23, 2026, shooting paint a picture not just of a violent incident but of systemic failure: Best was already known to the Secret Service, had been detained by agents twice in 2025, had been committed for psychiatric evaluation, and was under a court order to stay away from the White House grounds [5][6].

The Sequence of Events

The shooting began shortly after 6:00 p.m. ET. According to the Secret Service's preliminary statement, "the individual approached [the checkpoint], removed a weapon from his bag and began firing at posted officers" [2]. Reporters from CBS News and NBC News who were on the White House North Lawn reported hearing between 15 and 30 gunshots at approximately 6:04 p.m. [4][7].

Secret Service agents on post returned fire, striking Best. He was transported to George Washington University Hospital, where he was pronounced dead [2][3].

A civilian bystander was also shot during the exchange. As of initial reports, it remained unclear whether the bystander was struck by Best's rounds or by return fire from agents — a distinction that carries significant legal and investigative weight [7][8].

Reporters on the North Lawn were ordered to run inside the press briefing room. The lockdown encompassed the entire White House grounds [4]. It was lifted roughly 46 minutes later.

Trump, who was in the residence at the time, was described by the Secret Service as "not impacted" [2].

Who Was Nasire Best?

Best was a 21-year-old resident of Maryland with a documented history of mental illness and repeated encounters with federal law enforcement [5][6].

Sources told the New York Post that Best believed he was Jesus Christ [6]. Investigators found that on social media, he had also claimed to be "the real" Osama bin Laden and had posted at least one statement expressing a desire to harm Trump [5].

His prior contacts with the Secret Service were not ambiguous interactions. On June 26, 2025, Best was detained after he flagged down Secret Service agents and made threats. On July 10, 2025, he was detained again for entering a restricted area near the White House [5][2].

After one of these encounters — during which he reportedly claimed he was "God" — Best was committed to the Psychiatric Institute of Washington for a mental health evaluation [5]. A judge subsequently issued an order requiring him to stay away from the White House grounds. He violated that order on May 23 [5][6].

The profile raises a direct question: how does an individual with two documented detentions, a psychiatric commitment, and a standing court order manage to approach a White House checkpoint with a loaded firearm?

A Pattern of Escalation

The May 23 shooting did not occur in isolation. It was the second shooting at or near the White House complex in less than 30 days.

On April 25, 2026, Cole Tomas Allen, 31, of Torrance, California, sprinted through a security checkpoint at the White House Correspondents' Association Dinner carrying a 12-gauge pump action shotgun and a .38 caliber pistol. He shot a Secret Service officer — who survived thanks to a ballistic vest — before being subdued and arrested [9][10]. Allen was charged with attempting to assassinate the president. He had left a written manifesto stating his intention to target Trump administration officials [9][10].

And on March 9, 2025, Andrew Dawson, 27, of North Manchester, Indiana, was shot by Secret Service agents near the Eisenhower Executive Office Building after arriving in Washington armed with a BB gun, a cellphone-shaped gun, a .22 caliber rifle, and ammunition. Local police had tipped off the Secret Service that Dawson was suicidal and headed for Washington. Intelligence bulletins indicated he wanted to commit "suicide by cop" [11][12].

In 2023, Sai Varshith Kandula, 19, drove a U-Haul truck into a White House security fence. He told investigators he wanted to kill the president and praised Adolf Hitler; a Nazi flag was recovered from the vehicle [13].

The concentration of incidents — three armed approaches or shootings in roughly 14 months — is unusual by historical standards. Between 2011 and 2020, only two shooting incidents were recorded near the complex: Oscar Ramiro Ortega-Hernandez firing at the White House in 2011, and a Secret Service-involved shooting in 2020 [13].

Source: Secret Service / News Reports

Data as of May 24, 2026CSV

The Broader Security Landscape

The White House has experienced dozens of security breaches and incidents over the past decade, ranging from fence jumpers to drone incursions to vehicle attacks.

The most notorious breach occurred in September 2014, when Omar J. Gonzalez, an Iraq War veteran with PTSD, jumped the White House fence, sprinted 70 yards across the North Lawn, entered through the North Portico, ran through the entrance hall, overpowered a female Secret Service agent, and made it all the way to the East Room before being subdued [13][14]. That incident led to a major overhaul of Secret Service leadership and security protocols, including the installation of a taller fence with anti-climb features.

As recently as April 16, 2026 — just days before the Correspondents' Dinner shooting — a man jumped over a construction bollard near the Treasury Building on the northeast side of the complex, engaged in a physical altercation with officers, and was taken into custody. An officer was injured [15].

Source: Wikipedia / Secret Service Reports

Data as of May 24, 2026CSV

The data suggests that while physical barriers have been upgraded since 2014, the rate of individuals attempting to breach or attack the complex has not declined. The nature of threats has, if anything, shifted toward armed approaches and shootings — incidents that perimeter fencing is not designed to prevent.

Agencies Involved and Use-of-Force Review

Multiple federal and local agencies responded to and are investigating the May 23 shooting:

• U.S. Secret Service: Officers at the checkpoint engaged Best and discharged their weapons. The agency released a preliminary statement on the night of the incident [2].
• FBI: Director Kash Patel confirmed the bureau is assisting the Secret Service in the investigation [3].
• Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF): Confirmed involvement in the investigation [3].
• Metropolitan Police Department (MPD): Conducting the formal use-of-force review, as is standard when a person is killed by federal agents in a non-custodial shooting within the District of Columbia [3][7].

Under D.C. law, MPD's Internal Affairs Division investigates all officer-involved fatalities, including those by federal officers operating in the district. The investigation typically examines whether the use of lethal force was justified under the circumstances, reviews body camera and surveillance footage, and interviews witnesses. The U.S. Attorney's Office for the District of Columbia can then decide whether to present the case to a grand jury [7].

The Secret Service has not disclosed how many officers fired, how many rounds were discharged, or the exact type of weapon Best used.

The Use of Lethal Force: Was It Justified?

On its face, the case for the use of lethal force appears straightforward: an armed individual opened fire on federal officers, who returned fire. The use of deadly force in response to an active shooter is within standard law enforcement doctrine across virtually all U.S. agencies [2][7].

However, the wounding of a civilian bystander complicates the picture. If the bystander was struck by an agent's round rather than Best's, it raises questions about crossfire protocols in a crowded public area near one of the most visited sites in Washington. As of reporting, it remained unclear whose bullet struck the bystander [7][8].

Gun control advocacy groups responded quickly. Brady United issued a statement following the shooting, calling attention to broader firearms access issues, though the organization did not specifically critique the Secret Service's response [16].

No major civil liberties organizations had, at the time of reporting, issued formal statements questioning the proportionality of force. Given that Best initiated the gunfire, the legal threshold for justifiable deadly force — "imminent threat of death or serious bodily harm" — appears to have been met. The outstanding question is not whether agents were justified in shooting back, but whether the systems designed to prevent Best from reaching the checkpoint with a weapon failed.

International Comparisons: How Other Nations Protect Their Leaders

The White House occupies an unusual position among the world's head-of-government residences: it sits in a dense urban core and has historically maintained a degree of public accessibility — tourists can view the North Lawn from Pennsylvania Avenue, and until 1995, the street in front was open to vehicular traffic [17].

10 Downing Street, the British Prime Minister's residence, has been sealed behind steel gates on Whitehall since 1989, following an IRA mortar attack. Public access to the street itself is prohibited. Armed Metropolitan Police officers stand at the gates. The building is a Georgian townhouse on a narrow street — a fundamentally different defensive geometry from the White House's expansive grounds [17].

The Élysée Palace in Paris sits on the Rue du Faubourg Saint-Honoré, a commercial street. French Republican Guards and police maintain a visible security presence, but the perimeter is comparatively compact. France's security model relies more heavily on intelligence-led prevention and a broader network of domestic surveillance than on physical standoff distance [17].

The White House's security challenge is defined by the tension between its role as a public symbol — a "People's House" that tourists photograph and citizens protest in front of — and its function as a fortress protecting the head of state. Each successive incident pushes the perimeter outward and the public further back. The question for policymakers is where that line stops.

Impact on Bystanders and Staff

The 46-minute lockdown trapped journalists, staff, and visitors on the White House grounds. Reporters described being ordered to sprint into the press briefing room. Outside the perimeter, tourists and commuters in the area were ordered to shelter in place or move away from the scene [4][7].

The psychological toll of such events on civilian bystanders is not systematically tracked by any federal agency. The Secret Service and National Park Service do not maintain formal after-action mental health support programs for members of the public caught in security incidents near the White House complex [8].

Federal employees inside the White House have access to Employee Assistance Programs (EAPs), and the Secret Service provides post-incident psychological support to its own officers. But for a tourist from another country or a commuter walking past the checkpoint at 6 p.m. on a Saturday, no federal program exists to provide follow-up counseling or support [8].

The bystander who was shot — whose identity has not been publicly released — was in critical condition as of the most recent reports [2][7].

The System's Failure Point

The May 23 shooting forces a reckoning with a specific, identifiable failure: Nasire Best was not an unknown actor. He was flagged. He was detained. He was committed. He was ordered by a court to stay away. And he walked up to a checkpoint with a gun.

The gap is not in physical perimeter security — the checkpoint functioned as designed, and agents responded within seconds. The gap is upstream, in the handoff between the legal and mental health systems and the law enforcement agencies responsible for ongoing threat monitoring. A court order to stay away from the White House is only as effective as the mechanism for enforcing it. In this case, that mechanism did not prevent Best from arriving at the gate armed.

Coming less than a month after the Correspondents' Dinner shooting, and 14 months after the Dawson incident, the question is no longer whether the White House's physical defenses can withstand an attack. The question is whether the intelligence and behavioral threat assessment systems that are supposed to prevent these attacks from being attempted are keeping pace with the frequency and severity of the threats.

The Secret Service's Protective Intelligence and Assessment Division is specifically tasked with identifying and monitoring individuals who pose a threat to the president. In this case, the individual was identified, assessed, and still reached the gate.

Two shootings in 29 days. A court order violated. A bystander in critical condition. The system is being tested — and the evidence suggests the tests are coming faster than the fixes.