BRIAN ENTIN INVESTIGATES

Renowned DNA expert: Investigators should return to Nancy Guthrie’s house, new tech could solve case
A renowned DNA expert reveals how cutting-edge forensic technology and a re-examination of the crime scene could still solve the high-profile disappearance of Nancy Guthrie, despite complex DNA evidence.

Is Nancy Guthrie in Mexico? Polygraph tests and new potential leads - on the scene in Arizona
The Nancy Guthrie investigation reveals new details, including the use of polygraphs, FBI contact with Mexican authorities, and an increased reward, while an ex-FBI agent analyzes the suspect's potential movements and the unique challenges of the Tucson terrain.

Search for Nancy Guthrie in desert intensifies, subject questioned and released - what changed?
The investigation into Nancy Guthrie's disappearance sees a suspect detained and released, while former law enforcement officials sharply criticize the local sheriff's handling of the case, citing ego and a lack of collaboration with federal agencies.
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