[Pollard]

One of the central mysteries about the killing of cinematographer Hutchins remains what kind of projectile was fired from the gun and how it got there.

Hmmm, maybe try and get prints off the casings?

[TexasGator]

“Hmmm, maybe try and get prints off the casings?”

The armorer removed the casing from the gun and handled it prior to the cops arriving.

[Ruy Dias de Bivar]

I would like to see a real photo of the firearm used, along with the bullet and empty casing.
Some web pages simply show a fancy black powder pre-Civil War revolver that does not take cartridges.