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Bloodline Detectives

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

S4, EP9 "The South Lake Tahoe Strangler"

Police work for decades with emerging forensic sciences to identify the killer of two women in Lake Tahoe.

S4, EP5 "The Court Reporter Murder"

The identity of Nancy Bennallack's murderer is a mystery until the advent of investigative genetic genealogy.

S4, EP20 "Murder in Marietta"

The 1972 rape and murder of 9-year-old Debbie Lynn Randall is solved thanks to new science - 50 years later.

S4, EP6 "Murder by I-59"

A Jane Doe found by the side of the I-59 is unidentified until forensic science provides answers years later.

S4, EP20 "Murder in Marietta"

The 1972 rape and murder of 9-year-old Debbie Lynn Randall is solved thanks to new science - 50 years later.

S4, EP19 "The Sadistic Killer"

Investigative genetic genealogy unmasks the sexual deviant who raped and killed Christina Castiglione in 1983.

S4, EP18 "Carrie's Courage"

A woman who was sexually assaulted at gunpoint in the 1980s contacts a genetic genealogist to solve her case.

S4, EP17 "Murder in Apartment 101"

In 2022, investigative genetic genealogy exposes a killer who stabbed a woman to death in her home in 1980.

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.
Original Air Date: Apr 23, 2020
Genres: DocuseriesTV Series
Rating: TV14
Playback: HD
4 seasons available on demand
Available on

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