From NYT

http://www.nytimes.com/2012/10/15/us/politics/arlen-specter-senator-dies-at-82.html?pagewanted=all&_r=0

"Hard-edged and tenacious yet ever the centrist, Mr. Specter was a part of American public life for more than four decades. As an ambitious young lawyer for the Warren Commission, he took credit for originating the theory that a single bullet, fired by a lone gunman, struck both President John F. Kennedy and Gov. John B. Connally of Texas. Seconds later, Kennedy was struck by a fatal shot to the head from the same gunman, the commission found."