In the 1970s, the late chemist, Dr. Vincent Guinn analyzed the bullet fragments collected from President Kennedy's assassination.
Guinn thought no two bullets were alike based on his belief that all bullets have their own chemical makeup. In analyzing the five bullet fragments, he found different concentration levels of silver and antimony, and placed the fragments into two different categories.
That led Guinn to the conclusion that Kennedy was killed by only two bullets, those fired by Lee Harvey Oswald. However, staff researchers at Texas A&M say their analytical research reveals that bullets are not uniquely different, meaning there could have been a second shooter in the assassination of JFK.
A&M statistics research professor, Clifford Spiegelman said Guinn conclusion based on element concentration levels was flawed.
"Putting together the pieces into two groups doesn't mean that there are only two bullets," Spiegelman said.
Spiegelman began a statistical re-analysis of three boxes of bullets from the same batch of bullets Oswald used. The slight differences were detected but not significantly enough to conclude the bullets are not the same.
Fellow A&M researcher, Chemist Dennis James said new analytical standards and instrumentation not available during the 70s, now shows that one of the bullets recently analyzed was identical to one of the bullet fragments recovered after Kennedy's assassination.
"In one case we even found fragments from one bullet that matches one of the bullets from the crime...from the fragments that were analyzed back at that time," James said.
Both researchers say their discovery should not be interrupted as proof that a second shooter was involved in Kennedy's assassination.
Nor do they want to discredit Guinn's work, but they hope their research prompts a re-analysis of the actual bullet fragments in the care of the National Archives.
"What we're saying is the chemical analysis is flawed and needs to be redone," Spiegelman said.
"I think it would be a good idea to look at those original fragments and look at them with modern techniques and get more information," James said.