The Jinx: The Life and Deaths of Robert Durst (2015)

The Jinx delivers the most shocking moment in true crime history with Robert Durst's hot-mic confession, leading directly to his 2015 arrest on murder charges—a claim no other documentary on this list can match. Andrew Jarecki's HBO series meticulously pieces together evidence across three decades, culminating in Durst admitting, "killed them all, of course." This single data point—a confession caught on tape—proved more effective than the slower legal proceedings in #1 Making a Murderer, making The Jinx a landmark where documentary served as an instrument of immediate justice.