Federal authorities apprehended an armed suspect near the packed ballroom of the Washington Hilton on Saturday evening, thwarting what investigators say was a planned attack targeting administration officials gathered for a high-profile state dinner.
Cole Tomas Allen, 31, of Torrance, California, rushed a security checkpoint carrying a shotgun, handgun, and knives before attempting to reach the ballroom. He exchanged gunfire with law enforcement before being tackled and subdued, according to federal officials.
Allen was not shot during the confrontation and was transported to a local hospital. He is expected to face federal charges on Monday.
Writings Reveal Pre-Attack Planning
Moments before the attack, Allen sent a note to family members apologizing for his intended actions. In the correspondence, he outlined what he called "expected rules of engagement," specifically identifying administration officials as targets and listing them by rank.
"I experience rage thinking about everything this administration has done," Allen wrote in the note, which was shared with federal investigators.
The writings also referenced FBI Director Kash Patel by name, according to a senior administration official who reviewed the documents.
Family Alert Led to Police Response
Allen's brother contacted the New London Police Department in Connecticut around 10:49 p.m. Saturday—more than two hours after the incident—after receiving the note. His sister separately informed the Secret Service and Montgomery County Police that Allen had a pattern of making extreme statements and had referenced a plan to "fix" global issues.
Acting Attorney General Todd Blanche told reporters that investigators believe Allen traveled by train from Los Angeles through Chicago before arriving in Washington, D.C., checking into the hotel hosting the event within the previous two days.
From NASA Intern to Part-Time Teacher
Public records and interviews paint a complex picture of the suspect. Allen was a trained engineer who once interned for NASA and participated in Christian fellowship and recreational activities during his university years in California. More recently, he worked as a part-time teacher and developed video games.
Colleagues reportedly described him as a "genius" and he had recently earned recognition as "teacher of the month" before the incident.
President Donald Trump characterized the suspect as a "whack job" and "lone wolf" in remarks to media following the incident.
This report is based on information from NBC News and federal law enforcement officials familiar with the ongoing investigation.