I shot a lot of close-ups on this movie 'cause there's like a dual mystery, she's searching through her haunted past to find some truth and she's also following an external mystery where she comes to think she might be the killer.
The key fact missed most often by social scientists utilizing documentary films for data, is this: documentary films are not found or reported things; they're made things.
If you can't sleep, then get up and do something instead of lying there worrying. It's the worry that gets you, not the lack of sleep.