Teacher’s gruesome 1992 death launches decades-long mystery: 20/20 Oct. 5 Part 1
On Dec. 21, 1992, 25-year-old elementary school teacher Christy Mirack was found beaten and strangled to death in her Lancaster County, Pennsylvania, townhouse. WATCH THE FULL EPISODE OF 20/20: https://bit.ly/2Pq55QV…