Actor Alec Baldwin is on trial for involuntary manslaughter nearly three years after the fatal shooting of cinematographer Halyna Hutchins on the set of the film “Rust.” The prosecution argues that Baldwin's reckless behavior with a prop gun led to Hutchins' death, while the defense blames the film's armorer and assistant director for allowing a live round to be loaded into the gun. Baldwin has pleaded not guilty and faces up to 18 months in prison if convicted. The trial, taking place in Sante Fe, is expected to last two weeks. This is the third criminal case related to the shooting, with the armorer found guilty and sentenced to prison while the assistant director accepted a plea deal. The trial includes dramatic testimony from the sheriff's deputy who responded to the scene and conflicting accounts from Baldwin and witnesses.