An ex-FBI special agent has warned that mistakes made in the first two days of the search for missing Arizona grandmother Nancy Guthrie could never be undone, accusing Pima County Sheriff Chris Nanos of making 'devastating' errors that may affect any future prosecution.
Guthrie, 84, disappeared from her home on Sunday, 1 February, in a case that has since drawn national attention in the US. The FBI later released footage of a masked man on her front porch, quickly dubbed 'Porch Guy' online, and investigators have treated the incident as a likely abduction. With no sign of Guthrie months on, scrutiny has shifted from the mystery of what happened to hard questions about how the investigation was handled from the start.
