Found on NBCnews.com by Stephanie Gosk, Rich McHugh, Tracy Connor
After a big marathon, Derek Murphy sits down with his laptop in his western Ohio living room and gets to work, pulling up the online results and looking for red flags.
Like half a million other Americans, the 46-year-old business analyst used to run marathons himself but he slacked off after starting a family. Now he chases cheaters — armed with race data, finish-line photos, anonymous tips and an algorithm.
“I think most people aren’t aware of how much cheating goes on in marathons,” Murphy said.