Steven Avery, the Manitowoc County man who served nearly 18 years in prison before DNA tests proved he did not commit a sexual assault, will seek $36 million in a federal civil rights lawsuit to be filed Tuesday against the county, its former sheriff and its former district attorney. DNA tests sought by the Wisconsin Innocence Project, a program of the University of Wisconsin Law School, resulted in Avery’s being released from prison Sept. 11, 2003.