I've heard Ken Kratz, on several occasions, complain that "Making a Murderer" left out important details. But I've always dismissed this complaint as just a minor variation on the common prosecutorial refrain that we defense lawyers hear all the time: "He's quoting out of context!"
But in their book, "Avery," Kratz and coauthor Peter Wilkinson criticize the documentary for leaving out Dassey's May 13 interrogation. They claim that, in this interrogation, Dassey provided unprompted details about seeing Halbach's purse, camera, and phone. The problem, however, is that Dassey's statement was not unprompted. More accurately, his interrogators extracted it from him. Read more, including an excerpt from the actual interrogation transcript, in my newest Wisconsin Law Journal column.
(Warning to prosecutors: The column does include a quotation, and the quotation is taken out of its context. But by definition, a quotation necessarily is out of context.)