The Evidence Decisions in Nancy Guthrie's Case That May Carry Legal Consequences

The crime scene was allegedly released early. A sergeant with no homicide experience was reportedly assigned to lead. The FBI Director stated publicly that his agency was excluded for four days during the most critical window of the investigation. And DNA evidence collected from the home has reportedly been difficult to interpret, with mixed samples that haven't yielded a match in the FBI's CODIS database.

Nancy Guthrie, an 84-year-old woman, has been missing from her Tucson-area home for over three months. Blood confirmed as hers was found on the front porch. A masked, armed individual was captured...