IDK. Reports I recall indicated live ammunition removed from the revolver after the shooting. But reports written by semi-literate, firearm-ignorant and generally imprecise reporters. May have referred to the known spent casing; to blanks .... even dummies. A "news" invention: live dummies; these examples possibly for use in fully semi-automatic revolvers*. The CSI search-warrant affidavit may have had a trust-worthy number. It is linked in one of the earlier threads. "news" reports sometimes characterized that affidavit as the director's testimony(!?!)*.Perhaps I missed it, but how many bullets, or blanks were in the gun after it was fired? Did it have 1 empty and 5 live rounds? It matters.
*- NOTE TO SELF: bitter much over extremely poor quality reporterage?