Overview
- Investigators said Friday that an anonymous tip sent to Mexican volunteers prompted searches of the Mariposa area near Nogales but that searchers found no evidence tying those graves to 84‑year‑old Nancy Guthrie.
- The Pima County Sheriff’s Department, which is leading the probe with FBI support, said it has not been contacted by Mexican authorities about the tip and continues to treat the disappearance as suspicious and likely an abduction.
- Officials warn forensic bottlenecks are slowing progress because DNA and other lab tests from evidence collected in February have been sent to multiple labs and results remain pending under strict protocols.
- Law enforcement has moved to curb disruptive public activity around Guthrie‑related properties after multiple complaints, and YouTuber Alexander Zabel Jr. was arrested on charges including resisting arrest and public nuisance for livestreaming outside a residence.
- Volunteer groups reported finding more than 25 unmarked graves in the Mariposa region during recent months, a regional context that complicates verifying anonymous tips and increases the need for formal cross‑border investigation and DNA comparison.