Season 4
Bloodline Detectives focuses on familial DNA investigation, a search technique which uses genetic material from relatives to track down a suspect to solve violent crimes. Each episode shows detectives from all over the world solving cold cases by using the DNA of family members and how that additional DNA information is revolutionising genetic profiling to solve criminal cases.
Episodes
1 The Norcal Rapist Sep 30, 2023 2 Horror by the Roadside Oct 7, 2023 3 Murder on Elm Street Oct 14, 2023 4 The Mammoth Lakes Murder Oct 21, 2023 5 The Court Reporter Murder Oct 28, 2023 6 Murder by I-59 Nov 4, 2023 7 The Huntington Beach Body Nov 11, 2023 8 The Murder of Little Marise Nov 18, 2023 9 The South Lake Tahoe Strangler Nov 25, 2023 10 Stabbing in Sacramento Dec 16, 2023 11 The Phoenix Canal Killer Apr 1, 2024 12 Mommy Has Been Murdered Apr 1, 2024 13 The Three Rivers Killer Apr 1, 2024 14 Double Homicide in the OC Apr 1, 2024 15 The Mississippi Rapist Apr 1, 2024 16 Justice Delayed Apr 1, 2024 17 Murder in Apartment 101 Apr 1, 2024 18 Carrie's Courage Apr 1, 2024 19 The Sadistic Killer Apr 1, 2024 20 Murder in Marietta Apr 1, 2024