Mr. Eisenberg. When did you make the examinations?
Mr. Frazier. On the dates I mentioned, that is, November 23, 1963, and November 27, 1963.
Mr. Eisenberg. And what were your conclusions, Mr. Frazier?
Mr. Frazier. I found all three of the cartridge cases had been fired in this particular weapon.
Mr. Eisenberg. Can you describe the examination which you conducted to reach these conclusions?
Mr. Frazier. The first step was to fire test cartridge cases in this rifle to pick up the microscopic marks which are left on all cartridge cases fired in this weapon by the face of the bolt. Then those test cartridge cases were mounted on a comparison microscope, on the right-hand side, and on the left-hand side of the comparison microscope was mounted one of the three submitted cartridge cases, so that you could magnify the surfaces of the test and the evidence and compare the marks left on the cartridge cases by the bolt face and the firing pin of the rifle.
(At this point, Mr. McCloy left the hearing room.)
Mr. Eisenberg. I now hand you two cartridge cases, and ask you whether you can identify these cartridge cases?
Mr. Frazier. Yes, sir; these are the two cartridge cases we fired for test purposes in Exhibit 139.
Mr. Eisenberg. Do they have your mark on them?