Her lawyers claim she inspected the rounds, but didn't anticipate there were live rounds on set. So what did she inspect the rounds for? Dummies resemble live rounds, but they are not identical. Per the experienced armorers I have seen interviewed, they are concerned about checking dummies to make sure they are not live rounds.
"Hannah did everything in her power to ensure a safe set. She inspected the rounds that she loaded into the firearms that day. She always inspected the rounds. She did again right before handing the firearm to Mr. Halls, by spinning the cylinder and showing him all of the rounds and then handing him the firearm. No one could have anticipated or thought that someone would introduce live rounds into this set."
‘Rust’ Armorer Hannah Gutierrez Reed Backs Up Lawyers’ “Sabotage” Claims – Deadline
I don't believe anything her defense attorney says. He sounds like a typical defense attorney who will say anything. At trial, he's not required to prove anything and can make any spurious claim he can to defend his client.
JMO, it's better to wait until there are results from a full, professional investigation.