Mr. Baldwin had been charged with involuntary manslaughter after the gun he was practicing with went off on set, killing the film’s cinematographer. The film’s armorer still faces charges.
The actor’s lawyers had argued that a firearm law included by the prosecutors was not in effect at the time of the fatal shooting. It would have carried a mandatory five-year sentence.
The film’s star, Mr. Baldwin, and its armorer were accused of involuntary manslaughter after its cinematographer was slain by a gun on set that was loaded with a live round.
The officials who decided to bring involuntary manslaughter charges against the actor say he should have ensured the gun was safe to handle. Mr. Baldwin says that others were responsible.