Despite ongoing forensic efforts and multiple samples collected, no suspect has been identified more than 11 weeks after she ...

The FBI DNA hair sample Nancy Guthrie case has reached a critical forensic moment in 2026. Federal investigators now hold DNA ...

New forensic developments have emerged in the case involving Nancy Guthrie, as the FBI reviews DNA evidence linked to her ...

An investigator who wants to figure out if drugs contributed to a crime will likely collect hair samples from the person of interest. As hair forms in the follicle, drugs in the bloodstream slip into ...