As the judge read the verdict, Steven Avery listened, then shook his head. That was on March 18, 2007, a Sunday. Avery was found guilty at the end of a 27-day trial of killing Teresa Halbach, a 25-year-old photographer who disappeared on Halloween in 2005. Avery, then 44 years old, was sentenced to life in prison without the possibility of parole. He had already spent 18 years in prison for a sexual assault he did not commit before he was exonerated by DNA evidence in 2003. His story was featured in the Netflix docuseries "Making a Murderer," which cast doubt on the motives of police investigating Halbach's death and left many viewers with the impression that Avery, now 58, and his nephew Brendan Dassey, 31, were wrongfully convicted.