Will Steven Avery, featured in the Netflix series “Making a Murderer,” go free?

That is the hope of his lawyer, who is stepping up efforts to have him exonerated — or at least to get him a new trial — amid the public’s renewed attention to the case after the conviction of Mr. Avery’s co-defendant and nephew, Brendan Dassey, was overturned last week by a federal judge in Wisconsin.

The two men were found guilty in 2007 of the murder of Teresa Halbach, a 25-year-old photographer who disappeared on Halloween in 2005.

Kathleen Zellner, the lawyer who took over Mr. Avery’s defense in January, weeks after the Netflix series was released, said she has a different person in mind who she believes killed Ms. Halbach.

Here’s where the case stands.

Lawyer plans new tests

Ms. Zellner said she would file a motion next week to access DNA evidence collected from the crime scene and used against Mr. Avery. She plans to order new testing, some of which was not possible during the original trial.