From the news (cbs, cnn)
He was a refuel guy at Tupelo airport.
He had some flight instruction, but hadn't done a landing yet.
Over the radio, he made threats, but never carried them out.
When he was very low on fuel, he said that "this is the end."
A private pilot talked him down on the radio - he landed in a field a few miles from the airport.
He is in custody.