Opinion: The key question in the investigation

On Thursday, Alec Baldwin fired what he was told was a safe "prop gun" on the set of the film "Rust." Instead, the gun was apparently loaded with live ammunition, leading to the stunning death of cinematographer Halyna Hutchins and injury to the movie's director, Joel Souza. Though an intense police investigation continues, it seems highly unlikely that Baldwin will be charged with a crime. So, after such a terrible tragedy, now what?