I want to preface this review with the disclaimer that I don't believe this film is for everyone. I wouldn't recommend it to people who are feeling emotionally vulnerable, particularly if they are struggling with grief over the loss of a loved one.
Dear Zachary: A Letter to a Son About His Father caught my eye because of its unique cover. Dark, shadings of gray, a tree with a deep root system and lush foliage, but the trunk is completely severed. So much meaning there, especially in retrospect. Then I mosied on over to the reviews, and decided it was worth a look-see. From there, my laundry pile sat forgotten as I watched, captivated, horrified, and deeply moved for the next hour and a half. I can't provide you with a summary. The narrative is unique, and it would take something away from the flow and the viewer's sense of discovery to reveal more than the basic tagline: A filmmaker honors his murdered best friend by creating a film that documents his friend's life, death, and the the events that unravel after. If you dare, if you feel strong enough, give this one a watch.