BLOODLINE DETECTIVES explores the power of genealogy and the latest forensic technology used by law enforcement bring justice to unsolved homicides and sex crimes. The series uses Familial DNA taken from the crime scene and DNA that people have submitted to genealogy sites to see if there is someone who is a close match. From there genealogist can figure out who the suspect should be, and police can then make an arrest. Host Nancy Grace guides viewers through each episode's case along with expert interviewers, dramatic reconstructions and archival footage.