How DNA and Digital Footprints Cracked the Case of the Idaho Killer

Four University of Idaho students were found murdered in a house near campus in November 2022.
Investigators exhausted all prospects before turning to an advanced DNA analysis technique.
Bryan Kohberger, a Ph.D. student from a nearby university, was identified and arrested on the other side of the country.
Law enforcement investigators relied on digital footprints, including online shopping, car sales, carrying a cellphone, drives along city streets, and amateur genealogy, to solve the case.
The use of mass genealogy databases has raised concerns about privacy, but authorities say they have found potential in the system to produce leads that are unattainable through traditional investigative efforts.