Man Breaches Denver Airport Airfield Five Months After Fatal Crash

A security breach at Denver International Airport on Saturday sent airport personnel scrambling to stop a 23-year-old man who entered the airfield and headed toward an area that would have placed him on the tarmac, according to a Denver police report. The incident occurred around 2:30 p.m. on the north side of the airport, five months after another unauthorized entry ended in a fatal runway collision.

Airport personnel detained the man before Denver police officers arrived, according to the police report. Authorities identified him as Kibrom Tesfamichael, cited him for trespassing and transported him to a hospital because he needed medical treatment, police spokesman Jay Casillas said. Officials have not explained why he required treatment.

Airport spokeswoman Ashley Forest said Monday that the incident remained under investigation. She could not confirm whether the man reached any runways or hangars, whether aircraft operations were disrupted, or how he entered the restricted area.

Denver7 reported that airport radio traffic described a person who appeared to have jumped the perimeter fence. Airport officials have not provided a definitive account of how the man gained access or how long he remained on the airfield.

The latest breach has renewed questions about security at the airport following the May 8 death of 41-year-old Michael Mott, who entered an active runway and was struck by a departing Frontier Airlines aircraft. Medical examiners ruled Mott's death a suicide.

The collision ignited an engine fire and forced 231 passengers and crew members to evacuate using the aircraft's emergency slides. Attorneys representing passengers subsequently alleged in a lawsuit that a passenger died days after the incident from smoke and fume inhalation during the evacuation.

Airport CEO Phil Washington previously said an automated motion alert had detected activity near the perimeter fence. However, a person reviewing the alert saw deer outside the fence and mistakenly attributed the alarm to the animals, according to Washington's account of the incident.

The lawsuit, filed by attorneys for passengers on the Frontier flight, alleges that airport personnel missed an opportunity to prevent the collision. The attorneys claim an alarm sounded during the breach but that staff failed to stop runway traffic or notify air traffic control.

Joseph LoRusso, director of aviation at Ramos Law, questioned how an intruder could reach an aircraft despite the airport's surveillance systems.

"It exposes a weakness at a very large and important airport, where apparently somebody can just go over the fence while watched by cameras, by thermal infrared cameras, and can walk into an airplane," LoRusso said.

Denver7 also sought clarification from airport officials about changes to security measures following Mott's death. A spokesperson did not directly confirm whether additional measures had been introduced, saying the airport uses multiple layers of security but does not publicly discuss its security protocols.

Annmarie Heth, an assistant professor of aviation and aerospace sciences at Metropolitan State University of Denver, said the airport's size presents substantial challenges for perimeter protection.

"Securing an airport the size of DEN is a tremendous undertaking as it is the largest commercial airport in the United States by land size. We're talking about an airport that covers more than 53 square miles," Heth said. "The larger the perimeter, the more difficult it becomes to monitor every section.

Airports have to deal with remote areas, limited visibility, wildlife and people who may intentionally try to gain access. That's why airports rely on multiple layers of security rather than just a fence."

Heth said detecting an intrusion quickly and preventing an unauthorized person from reaching an active runway or taxiway are critical to airport safety.

"No security system is 100% foolproof. Someone determined to get over or through a fence may find a way. The important thing is how quickly the intrusion is detected and how effectively airport personnel respond. Preventing someone from reaching an active runway or taxiway is critical," Heth said.

Jeff Price, an aviation security expert who previously spoke with Denver7, said perimeter fences are designed to delay intruders and give airport personnel time to respond, as well as prevent people from accidentally entering active airfield areas.

According to Denver police records cited by The Denver Post, Mott was one of six people who breached the airport's perimeter fence since 2023. Two other people entered the airport's warehouse area by jumping a boundary fence during that period. The lawsuit also describes other security breaches, including an incident in May when a man drove a vehicle through an airport security gate.

Court records show that Tesfamichael had previous cases in Colorado. Charges involving controlled-substance possession, obstructing a police officer and assaulting a police officer with bodily fluids were dismissed after incidents in 2023. A misdemeanor criminal mischief case filed in Adams County in 2025 remained pending, according to The Denver Post.