The union back-stage employees had quit the movie set several hours before and replacement workers hired. The union had just come out of tough contract negotiations and had voted for a strike if needed. They got a contract. I suspect emotions were running high since workplace safety was one of their primary complaints during the contract talks and the walk-out.I wouldn’t be surprised if investigation proves a disgruntled union worker slipped a round in the gun.
You sure gotta wonder about that union aspect. That would move straight into the premeditated zone.