They could have been right, but who knows?
3 seconds sound clip from the Casino (1995) movie soundboard.
You can hear this line at 02:24:10 in the Blu-ray version of the movie.
Quote context
[...]
- He never knew when to keep his fuckin' mouth shut.
- The cops shot Blue because they thought his hero sandwich was a gun.
- They could have been right, but who knows?
- What gun? He's got a fuckin' hero sandwich here.
- What do you want? It's pitch black out here, it's... Pitch black!
[...]