“The chase for the truth will go on forever, I suspect," said Philip Shenon, who wrote a 2013 book about the killing of JFK ... as Texas Gov. John Connally and his wife, Nellie, in Dallas ...

FILE - President John F. Kennedy waves from his car in a motorcade approximately one minute before he was shot, Nov. 22, 1963, in Dallas. Riding with President Kennedy are first lady Jacqueline ...

“The chase for the truth will go on forever, I suspect,” said Philip Shenon, who wrote a 2013 book about the killing of JFK ... as Texas Gov. John Connally and his wife, Nellie, in Dallas ...

Riding with President Kennedy are first lady Jacqueline Kennedy, right, Nellie Connally, second from left, and her husband, Texas Gov. John Connally, far left. (AP Photo/Jim Altgens, File) ...

“These long-secret records shed new light on JFK’s mistrust of the ... Texas Gov. John B. Connally Jr. and Connally’s wife, Nellie, as their motorcade drove through Dealey Plaza in Dallas.

Riding with President Kennedy are first lady Jacqueline Kennedy, right, Nellie Connally, second from left, and her husband, Texas Gov. John Connally ... Force One carrying JFK and first lady ...

John Connally and his wife, Nellie, in Dallas, Texas, Nov. 22, 1963. (AP Photo/Jim Altgens, File) Historians hope for new details about the man who killed JFK A year after the assassination ...

FILE - President John F. Kennedy waves from his car in a motorcade approximately one minute before he was shot, Nov. 22, 1963, in Dallas. Riding with President Kennedy are first lady Jacqueline ...

President John F Kennedy, First Lady Jacqueline Kennedy, Texas Governor John Connally and his wife Nellie Connally ride together in a convertible limousine in Dallas. Several stops later President ...