Gary Mack, a Dallas broadcaster whose fascination with the Kennedy assassination led him to become a widely consulted expert on the event and, eventually, the curator of the Sixth Floor Museum, which is devoted to the assassination, died on Wednesday in Arlington, Tex. He was 68.
The museum said on its website that he had died after a long illness. The Dallas Morning News reported that his wife, Karin Strohbeck, said the cause was a rare and aggressive cancer.
https://www.nytimes.com/2015/07/17/us/gary-mack-kennedy-assassination-expert-dies-at-68.html