— ... спецназ нервно курит в сторонке... — ... гадая, что курили мы ... (с) Андрей Уланов и Ольга Громыко
![](http://static.diary.ru/userdir/3/1/7/3/3173731/84373761.jpg)
David became an expert in forensics to play the role of Dr. Mallard, including appearing at Medical Examiner Conventions. Don Bellisario, creator of NCIS, says that McCallum's knowledge became so vast that at the time of his interview he was considering making him a technical advisor on the show.
David attended the 21st Annual James Earl Ash Lecture, held May 19, 2005 at the Armed Forces Institute of Pathology. This evening was for honoring America's service members. He gave a lecture called, "Reel to Real Forensics," with Cmdr. Craig T. Mallak, U.S. Armed Forces medical examiner. It featured a presentation comparing the real-life work of the Armed Forces Medical Examiner staff, with that of the fictional naval investigators appearing on NCIS.