Kelly Agnew is an accomplished ultrarunner who began taking on marathons and ultramarathons in 2011. Within a few years of starting, he completed the Leadville 100, the Rocky Raccoon 100-miler, and a few more prominent ultramarathons, before experiencing a breakthrough in 2013.
Agnew finished second at the 2013 Pony Express Trail 100, and he claimed the fastest known time on the White Rim trail a few years later. He quickly developed a knack for fixed time events, which are races to see who can cover the most distance in a given amount of time, typically 24 or 48 hours. This is where suspicions apparently began to arise.