[Boogieman]

"No, they aren’t and law enforcement should know the difference."

You weren't talking about law enforcement, you were talking about an EMS who probably just saw them lying on the floor.

As for them being identical, they are very slightly different, but someone seeing them lying on the floor at a distance probably wouldn't be able to distinguish them. For example, here is a .223 and a 5.56 casing, both of them reloaded with .223 bullets. Can you tell which is which from just glancing at this photo? Even if you can, could you imagine how hard it would be too make that call if there wasn't the other casing to compare against, and you were only looking at one type?:

[Uncle Chip]

For example, here is a .223 and a 5.56 casing, both of them reloaded with .223 bullets.

Which brings up an interesting scenario:

.223 bullets in 5.56 casings -- which means the victims could have been killed with .223 bullets which then left 5.56 casings all over the place.

[RummyChick]

I wouldn’t know the difference.

But a poster coming onto this site claiming that the EMS guy knew about guns and saw 5.56 casings all over the place - which means he also had to see the ammo that hadn’t been shot- would indicate he knew they were 5.56

If 5.56 closely looks like .223 then why say 5.56 when it has been disclosed it was a .223 gun.

What was the agenda with the FR poster???

Or now is there something lurking that the casings were really .223 and now the poster has to backpeddle.
The whole thing is weird.