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and nothing suspicious, and the Cook County Medical Examiner's office said he died July 20 of natural causes.
• Now, authorities have determined that Khan, 46, ingested a lethal dose of cyanide. The finding, spurred by a relative's pleas for an expanded screening, has triggered a homicide investigation, the Chicago Police Department said Monday.
• "It's pretty unusual," said Cook County Medical Examiner Stephen Cina, commenting on the rarity of cyanide poisonings. "I've had one, maybe two cases out of 4,500 autopsies I've done."
• Khan, who owned a number of dry cleaners, stopped in at the convenience store near his home in the West Rogers Park neighborhood on the city's North Side in the summer and bought a ticket for an instant lottery game.
• ___

• LUBBOCK, Texas (AP) -- Attention, bread shoppers: A Texas company could have the answer to some consumers' unwelcome discovery that just-purchased loaves contain mold.
• MicroZap Inc. claims its technology allows bread to stay mold-free for 60 days. The bread is bombarded with microwaves for about 10 seconds, which kills the mold spores, said chief executive officer Don Stull said.
• The process could eliminate bakers' need for preservatives and ingredients used to mask preservatives' flavor, as well as reduce food waste and increase bread's shelf life, he said.
• Researchers at Texas Tech University also see using the technology in bread made in developing countries, where there are fewer food safety standards and spoilage is a problem.
• "It could help us provide an abundant food source for those in need," said Mindy Brashear, director of the Lubbock university's Center for Food Industry Excellence. The prospect of helping people in developing countries is what motivated the microbiology professor to help develop the technology over the last eight years.
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• TUNIS, Tunisia (AP) -- The only suspect in custody over the attack on the U.S.

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