NBC News obtained a seven-minute clip of communications between two air-traffic controllers and the pilot of Prince's plane as it made an unscheduled stop in Moline, Illinois, six days before the star died.
In the clip, an air traffic controller at the Chicago En Route Radar Center in Aurora, Illinois, directs the pilot to the Quad Cities International Airport in Moline, Illinois, about 120 miles to the west. The plane had been bound from Atlanta to Minneapolis.
The controller in Moline then asks his counterpart in Aurora why the jet needs to land:
"What's the nature of the emergency?"
"An unresponsive passenger," says the Aurora.