Long after JFK assassination, gunshot forensics still limited

Warren Commission Report — A new way to fight crime, called neutron activation analysis, uses penetrating neutron radiation to help catch a criminal from only a speck of evidence. The Warren Commission included the results of a neutron activation analysis test of Lee Harvey Oswald in their recent assassination study. The tests, however, could not prove that Lee Harvey Oswald fired the rifle.… Activation analysis may replace the old chemical “paraffin test” that law enforcement officials have found unreliable.... — Science News Letter, October 10, 1964