A Pattern of Breaches Preceding a Fatal Incident
Denver police have responded to six cases of people breaching the perimeter fence at Denver International Airport since January 2023, according to police records reported by The Denver Post on August 17, 2026. The most serious was a fatal incident on May 8, 2026, when 41-year-old Michael Mott scaled the airport’s eight-foot, barbed-wire-topped security fence and walked onto a runway shortly before 11:20 p.m. He was struck and killed by a Frontier Airlines aircraft that was accelerating for takeoff. Denver’s chief medical examiner, Dr. Sterling McLaren, ruled Mott’s death a suicide, according to the Post.
Of the other five recorded breaches, one involved a man who crashed through a perimeter fence gate and drove onto the airfield, causing more than $2,000 in damage; another involved a man who jumped the fence after crashing his car nearby and was later found sitting on an active taxiway around 6:40 a.m.; and a third involved a man who told police he was trying to walk to Texas. Two additional trespassing cases involved people jumping the boundary fence into the airport’s warehouse area. At least two of the eight individuals involved in these incidents had active arrest warrants at the time of their breach, the Post reported, citing probable-cause statements.
How the Numbers Compare Nationally
There is no national database that tracks airport perimeter breaches specifically, and airports report trespassing incidents inconsistently, according to Annmarie Heth, an assistant professor of aviation and aerospace sciences at Metropolitan State University of Denver who was interviewed by the Post. The Federal Aviation Administration does separately track runway incursions — a broader category covering air traffic control errors, pilot violations, and unauthorized pedestrians or vehicles on runways and taxiways — at airports with control towers, including DIA. The FAA’s database recorded roughly 5,890 runway incursions nationwide between January 2023 and June 2026, of which 1,022 involved unauthorized pedestrians or vehicles. Only two of the six DIA police-documented perimeter breaches during that period appear in the FAA’s database, which lists a total of 37 incidents involving unauthorized vehicles and pedestrians at DIA dating back to April 2006, per Post reporting.
Officials Say the Uptick May Reflect Better Detection, Not Worse Security
Heth told the Post that fatal breaches like the one that killed Mott are extremely rare and that advanced perimeter technology usually allows security personnel to intercept trespassers before an incident escalates. “Fences are there to keep honest people out,” she said. “If somebody is really intent on getting through a fence, they’re going to get through.” She added that improved sensors, cameras, analytics and staff training may explain why more incidents are being detected and reported today compared with when she worked as an airport operations manager in Florida between 2009 and 2015, when even wind gusts could trigger perimeter alarms and prompt an investigation.
A Denver Police Department spokesman, Doug Schepman, said the department’s dedicated Airport Police Bureau at DIA works closely with airport operations staff, monitors data on breach trends, and adjusts resources accordingly. DIA officials declined to comment on the individual trespassing incidents when contacted by the Post. The FAA and the National Transportation Safety Board also declined to comment specifically on DIA’s perimeter breaches.
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