Mr. Frazier. Generally that is true, unless there is a great pressure, unless the brass of the cartridge case is soft, or unless the marks are very sharp on the breech face; then they will be impressed into the brass.
Mr. Eisenberg. This picture represents only a portion of the primer. You examined the entire primer to make your identification?
Mr. Frazier. Yes, sir.
Mr. Eisenberg. And found?
Mr. Frazier. It would not have been necessary to examine the entire primer necessarily, but of course we do examine the entire primer, pick out all of the marks on the left and the right, and rotate the cartridge cases and look at them from various angles, before arriving at a conclusion.
Mr. Eisenberg. Can you amplify the meaning of the statement that it would not be necessary to examine the entire primer?
Mr. Frazier. There are sufficient marks shown in this photograph upon which to base an identification. In other words, it would not be necessary to have the rest of the primer if it had been mutilated or destroyed or something of that nature.
Mr. Eisenberg. Did you also examine the firing-pin impression in the cartridge?
Mr. Frazier. Yes, sir.
Mr. Eisenberg. Did you take a picture of that examination?