MEXICO CITY, Mexico (CNN) -- What do software mogul Bill Gates and banking investor Warren Buffett have in common with wanted Mexican drug lord Joaquin "El Chapo" Guzman Loera?

They are all featured in Forbes magazine's world's billionaires report as "self-made" billionaires.

Guzman Loera, whose nickname means Shorty, escaped from a Mexican prison in 2001. He heads the powerful Sinaloa cartel, investigators say. Authorities on both sides of the U.S.-Mexico border blame the Sinaloa and other cartels for a surge in violence in the region.

He ranked 701th on Forbes' yearly report, with an estimated fortune of $1 billion.

Mexican Attorney General Eduardo Medina Mora expressed outrage at the publication and described Forbes' calculations on Guzman Loera's fortune as mere "speculation."

"I will never accept that a criminal could be recognized as someone distinguished, even if it is by a magazine like Forbes," Medina Mora said to local media during a drug traffic summit Thursday in Vienna, Austria.

Forbes is "comparing the deplorable activity of a criminal wanted in Mexico and abroad with that of honest businessmen," he said.

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