A resurfaced television segment from 2017 has given the public an unexpected window into the early life of Cole Tomas Allen, the 31-year-old California man accused of opening fire at the White House Correspondents' Dinner on 26 April 2026. In theclip, Allen is heard calmly explaining a wheelchair emergency brake prototype he had designed as an undergraduate student at the California Institute of Technology, a stark image that has circulated widely online since his arrest.
The footage, which originally aired on ABC7 Los Angeles on 13 March 2017, was filmed at the 'Aging into the Future'conference, an event organised by St Barnabas Senior Services and held at the Los Angeles Convention Center. Allen, then a senior mechanical engineering student at Caltech, attended as an undergraduate inventor representing the university.
In the segment, Allen is heard walking a reporter through the mechanics of a wheelchair safety device he built largely from PVC piping. 'The wheelchair brakes tend to lock the wheels, but don't lock the chair to the ground. But with this device, that will prevent the chair from skidding at all,' Allen told ABC7 in 2017.
Speaking in a measured tone, Allen demonstrated the prototype emergency brake at the conference, surrounded by fellow innovators. Engineering experts who later reviewed the cliptoldFox News Digital that the contraption, while functional in concept, did not reflect particularly advanced engineering for a graduating Caltech senior.
Allen earned a degree in mechanical engineering at Caltech in 2017, before going on to receive a master's in computer science at California State University, Dominguez Hills, in 2025. His LinkedIn profile also showed membership in Caltech's Christian Fellowship and Nerf Club during his time on campus.
During his senior year, heservedas a teaching assistant in the mechanical engineering department, and in 2014, he interned at NASA's Jet Propulsion Laboratory for approximately three months.
After graduating, Allen worked briefly as a mechanical engineer before transitioning into tutoring and independent game development. He was working forC2 Education, a private company that prepares students for college entrance exams, and was named 'Teacher of the Month' in December 2024.
Interview du tireur présumé, Cole Allen, en 2017, par ABC7.A l’époque, il avait fabriqué un accessoire pour aider les fauteuils roulants à freiner.pic.twitter.com/52jiHMehzU
Allen, 31, a resident of the Los Angeles suburb of Torrance, isaccusedof rushing a security checkpoint armed with a shotgun, handgun and knives, and exchanging gunfire with law enforcement outside the Washington Hilton on the night of the correspondents' dinner.
Allentold family membershe was a 'friendly federal assassin' in a message sent shortly before the shooting, according to ABC News sources. Acting USAttorney General Todd Blanchesaid it appeared Allen was targeting people in the Trump administration, including the president. One Secret Service agent was struck by gunfire but was protected by a bulletproof vest and is expected to recover.
Source: International Business Times UK
