On the evening of December 28, 2014, Kourtney Bogan got an urgent call from her younger brother in Clarksville, a rural town of 3,200 bordering Oklahoma in far northeast Texas. Their mother, Gayla Bogan, who’d been fighting a respiratory infection over Christmas, was in bad shape. Kourtney jumped in her car and drove over. “When I got there, she was gasping for air, like she couldn’t breathe or something was blocking her airway,” Kourtney said. “I was panicking. She kept saying that she couldn’t breathe.”
Kourtney and her brother, Bristian, tried sitting Gayla upright in a chair, but it didn’t help. A minute later, she became “nonresponsive,” Kourtney said. She called 911. Within five minutes, an ambulance had arrived at the house, and workers loaded Gayla into the vehicle. They…