Mr. Eisenberg. And how did you make the examination?
Mr. Cunningham. I first marked these cartridge cases upon receiving them. There were four. I would like to state, first of all that Special Agents Frazier and Killion also independently examined these four cartridge cases, and made the same comparisons that I am going to state. I am telling you what I found—although they independently arrived at the same conclusion.
The cartridge cases were first marked and examined for the presence of any individual characteristic marks on these cartridge cases whereby it would be possible to identify them as having been fired in a weapon. I then test-fired Commission Exhibit 143, using similar ammunition, and microscopically compared the four cartridge case—one at a time—that is Commission Exhibit 594—with the tests obtained from the revolver, Commission Exhibit 143.
Mr. Eisenberg. I hand you here two cartridge cases, and ask you whether you are familiar with these cartridge cases?
Mr. Cunningham. I am.
Mr. Eisenberg. And can you describe these cartridge cases to us?
Mr. Cunningham. Yes. One is a Western .38 Special cartridge case. The other is a Winchester .38 Special cartridge case.
Mr. Eisenberg. And how did you get possession of these cartridge cases?
Mr. Cunningham. These were test-fired in Commission Exhibit No. 143, by myself.
Mr. Eisenberg. So these are the test cartridges you were referring to?