“Dead Man’s Wire,” Gus Van Sant’s latest film is a darkly comedic thriller about the kidnapping of a prominent banker — a case that captivated the nation and unexpectedly turned the abductor into an outlaw folk hero. “Dead Man’s Wire” fits with Van Sant’s interest in real-life characters and anti-heroes. Ahead of the release of the historical true-crime thriller, the director details how he’s learned to take a judicious look at the stories he adapts to ensure they can be sustained cinematically