Yet “Making a Murderer” never provokes the type of intellectual and psychological oscillation so characteristic of Koenig and Snyder’s “Serial.” Instead, the documentary consistently leads its viewers to the conclusion that Avery was framed by the Manitowoc County Sheriff’s Department, and it contains striking elisions that bolster that theory. The filmmakers minimize or leave out many aspects of Avery’s less than savory past, including multiple alleged incidents of physical and sexual violence. They also omit important evidence against him, including the fact that Brendan Dassey confessed to helping Avery move Halbach’s S.U.V. into his junk yard, where Avery lifted the hood and removed the battery cable. Investigators subsequently found DNA from Avery’s perspiration on the hood latch—evidence that would be nearly impossible to plant.

Perhaps because they are dodging inconvenient facts, Ricciardi and Demos are never able to present a coherent account of Halbach’s death, let alone multiple competing ones. Although “Making a Murderer” is structured chronologically, it fails to provide a clear time line of events, and it never answers such basic questions as when, where, and how Halbach died. Potentially critical issues are raised and summarily dropped; we hear about suspicious calls to and messages on Halbach’s cell phone, but these are never explored or even raised again. In the end, despite ten hours of running time, the story at the heart of “Making a Murderer” remains a muddle. Granted, real life is often a muddle, too, especially where crime is involved—but good reporters delineate the facts rather than contribute to the confusion.

Despite all this, “Making a Murderer” has left many viewers entirely convinced that Avery was framed. After the documentary aired, everyone from high-school students to celebrities jumped on the “Free Avery and Dassey” bandwagon. In the weeks since, people involved in the conviction have been subjected to vicious and in some cases threatening messages from Netflix-watching strangers. (So have people who were not involved, including the Manitowoc Police Department, a separate entity from the county sheriff’s department.)

For those people, and for others close to the original case, “Making a Murderer” seems less like investigative journalism than like highbrow vigilante justice.