Follow the clues across social media and text messages. 20/20 “The Last Text” full episode premieres Friday, Jan. 3rd on ABC ...

How did he go from honor student and Ivy League to alleged killer? The all-new "20/20" special edition breaks Thursday night ...

ABC News Studios primetime one-hour program, "Manhunt: Luigi Mangione and the CEO Murder – A Special Edition of 20/20" ...