I can't say that I've tried Taco Bell's Doritos Locos Tacos, but it seems as though I'm in the minority. The menu item introduced last year has been so popular that it's helped create 15,000 new jobs for the fast food chain, Taco Bell CEO Greg Creed says. More than 1 million of the tacos are reportedly sold every day, with more than 500 million sold since the product was launched. [This Fast Company article provides an in-depth look at the origins and impact of the chain's "disruptive faux cheese-dusted taco."] Creating a taco shell out of Doritos chips was clearly an inspired concept -- and a federal prison inmate is now claiming that idea was all his. The Dallas Observer reports (via Consumerist), that Gary Cole, an inmate at a high-security prison in Colorado, filed a federal lawsuit in Texas this week alleging that Taco Bell stole his idea for the Doritos tacos. As proof, Cole offers a copy of a 2006 letter sent to his attorney, in which Cole recorded ideas for a number of potential products, including "Tacos [sic] Shells of All Flavors (Made of Doritos)." Among the other merchandise ideas listed were some items branded "Divas...

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