The Disappearance of Nancy Guthrie

Carlos Palazuelos was held for hours without charges in the Nancy Guthrie case — now he's suing for $3.25 million and demanding sealed evidence.

Mystery DNA found inside Nancy Guthrie's home is now driving a new phase of the investigation — whose genetic fingerprint is it, and what does it mean?

A lawyer is now speaking out for a man detained in the Nancy Guthrie disappearance — raising questions about what evidence actually justifies holding someone.

A detained person of interest's lawyer is demanding answers in the Nancy Guthrie disappearance — raising questions about what investigators actually have.

Nancy Guthrie's son-in-law Tommaso Cioni is being eyed as a possible suspect, according to a law-enforcement source cited by journalist Ashleigh Banfield.

Six months after Nancy Guthrie vanished from her Tucson home, scrutiny of the investigation is raising a separate question: could Pima County itself be legally liable?

FBI analysts are now examining DNA pulled from a Tucson home — and whether it links a suspect to Nancy Guthrie's case.

A retired FBI agent says investigators made "mistakes" at Nancy Guthrie's crime scene — raising the question of whether errors could derail the case.

A retired FBI agent says "mistakes" on day one of Nancy Guthrie's disappearance may have cost investigators their best chance at evidence.

Nancy Guthrie may have vanished because criminals targeted her to pressure daughter Savannah's crypto wealth — a chilling "wrench attack" theory explained.