Avery murder conviction

FILE - In this March 13, 2007 file photo, Steven Avery listens to testimony in the courtroom at the Calumet County Courthouse in Chilton, Wis. A new book by a district attorney who helped get Avery out of prison the first time says a lot can be learned from the original wrongful conviction and how it set into motion a series of events that destroyed lives, including the killing of 25-year-old Teresa Halbach on Halloween 2005. Avery spent 18 years in prison for rape before he was freed in 2003 after DNA samples proved another man, Gregory Allen, committed that crime. Avery was ultimately sentenced in 2007 to life without chance for parole for Halbach’s death near his family's rural auto salvage lot. (AP Photo/Morry Gash, File)

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