The armorer, Hannah Gutierrez, has been convicted of involuntary manslaughter in the Rust movie shooting case.
Gutierrez was found not guilty of tampering with evidence.
The jury reached a verdict in just over two hours of deliberation.
The verdict could have implications for the upcoming trial of actor/producer Alec Baldwin.
Gutierrez could face up to 18 months in prison and a fine of $5,000.