A jury has convicted a movie weapons supervisor of involuntary manslaughter in the fatal shooting of a cinematographer by actor Alec Baldwin during a rehearsal on the set of the Western movie Rust. The verdict against movie armorer Hannah Gutierrez-Reed assigned new blame in the fatal October 2021 shooting of cinematographer Halyna Hutchins after an assistant director last year pleaded no contest to negligent handling of a firearm. Gutierrez-Reed also had faced a second charge of tampering with evidence, stemming from accusations that she handed a small bag of possible narcotics to another cre…