Former Harris County, Texas, prosecutors Casey Garrett and Alicia O'Neill, travel to Leon County to find the person who brutally attacked a retired music teacher, who is well-respected in the community.

Former Harris County prosecutors Casey Garrett and Alicia O'Neill head to Flint, Mich., to help with cases that have yet to be processed for DNA evidence. They work closely with the Flint Police Department officers to track down a violent rapist who terrorized a family and another who lured his victim into his home.