"DNA evidence from Nancy Guthrie's home may provide limited results due to low levels. Investigation ongoing with Pima County Sheriff's Department, no susp
Title: DNA Evidence in Nancy Guthrie Disappearance Case May Yield Limited Results
Summary Lead:
- DNA recovered from Nancy Guthrie's home may not provide a usable profile for comparison in federal and private sector databases due to low levels.
Investigation Concerns:
- Low-level DNA sample raises doubts over getting a clean, reliable result.
- Despite this, scientific techniques can potentially enhance the sample but would take longer.
Analysis Ongoing:
- Pima County Sheriff's Department contracted lab in Florida continues to analyze samples with no conclusion yet on usability.
No Suspects or Persons of Interest Named:
- Authorities haven't named a suspect or person of interest after four weeks into the investigation.
- Last week, all of Nancy Guthrie's three adult children and their spouses were cleared as possible suspects.
Reward Offered:
- Savannah Guthrie's family announced a reward of up to $1 million for information leading to her return, followed by an additional $100,000 reward from the FBI.
Inconclusive DNA Match:
- A DNA profile from gloves found near Guthrie's house didn't match any entries in the FBI's Combined DNA Index System (CoDIS).
Investigative Technique:
- Authorities turn to genetic genealogy as they seek to maximize DNA evidence.
- The method uses publicly available genealogy sites to find genetic relatives of an unidentified DNA sample that may belong to a potential suspect.
Participation Voluntary:
- Law enforcement agencies can use two databases for such investigations: GEDmatch Pro and FamilyTreeDNA.
- Both companies stress strict privacy, data security, and ethical use in their operations.
Legal Process Required:
- Other publicly available DNA submission sites don't allow law enforcement agencies to use their services as freely without going through the legal process.
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