Mr. Cadigan. Twenty-three and one-half years.
Mr. Eisenberg. What was your training in this field?
Mr. Cadigan. Upon being assigned to the laboratory I was given a specialized course of training and instruction which consisted of attending various lectures and conferences on the subject, reading books, and working under the direction of experienced examiners.
Upon attaining a required degree of proficiency, I was assigned cases on my own responsibility, and since that time I have examined many thousands of cases involving handwriting, hand printing, typewriting, forgeries, erasures, alterations, mechanical devices of all types, pens, paper, and ink. I conduct research on various problems as they arise and assist in the training of our new examiners.
Mr. Eisenberg. Have you testified in Federal or other courts, Mr. Cadigan?
Mr. Cadigan. Yes; in many Federal and State courts, and military courts-martial.
Mr. Eisenberg. Mr. Cadigan, I now hand you Commission Exhibit No. 773, and I ask you whether you have examined that item.
Mr. Cadigan. Yes; I have.
Mr. Eisenberg. For the record, that consists of an application to purchase a rifle, addressed to Klein's Sporting Goods in Chicago. Mr. Cadigan, I now hand you an item consisting of a roll of microfilm labeled D-77, and ask you whether you are familiar with that roll of microfilm?
Mr. Cadigan. Yes; I am.