DALLAS, Sept. 14 (UPI) -- New bullet analysis casts doubt on the lone gunman theory in the assassination of U.S. President John F. Kennedy, researchers say.
A team of scientists has studied bullets from the same manufacturing lot as those used by Lee Harvey Oswald in the Kennedy assassination in 1963, The Dallas Morning News reported Sunday.
Dr. Cliff Spiegelman of Texas A&M University says the composition of bullet fragments from the Kennedy shooting did not match the composition of bullets from the same manufacturer.
Spiegelman, a statistics professor, said the fragments found weren't nearly as rare as a government expert witness, Dr. Vincent Guinn, determined. He said all five fragments came from two bullets fired by Oswald. A third shot missed.
"The claim was made that those five fragments could only have come from two bullets," Spiegelman said. "Our research showed it could have been two or more. And if it is more than two, there is an increased likelihood that someone else provided one of them."
The research paper by Spiegelman and colleagues -- "Chemical and Forensic Analysis of JFK Assassination Bullet Lots: Is a Second Shooter Possible?" -- does not say there was more than one gunman, only that the single-gunman theory can't be supported by science.