7. Avery had drawn a torture chamber while in prison and was violent to other women
According to an Appleton Post Crescent article from March 9, 2006, "While he was in prison, Steven Avery planned the torture and killing of a young woman, new documents released Wednesday indicate. The allegations are included in 22 pages of court documents accompanying additional charges filed by Calumet County Dist. Atty. Ken Kratz. ... Kratz also included in Wednesday's filings statements from prisoners who served time with Avery at Green Bay Correctional Institution. They said Avery talked about and showed them diagrams of a torture chamber he planned to build when he was released."
Furthermore, reported the newspaper, "The filings also include statements from a woman, now 41, who said she was raped by Avery, who told her 'if she yelled or screamed there was going to be trouble.' There also is an affidavit from a girl who said she was raped by Avery. 'The victim's mother indicated that the victim does not want to speak about the sexual assault between her and Steven Avery because Steven Avery told her if she 'told anyone about their activities together he would kill her family,'" the filing said. According to the newspaper article, "The affidavit said Avery admitted to his fiancee that he had sexually assaulted the girl."