ABC News' Melissa Adan reports on the latest in the investigation into the possible abduction of Nancy Guthrie from her Arizona home.

A Massachusetts bill would require annual audits of “owed” DNA from convicted felons, closing gaps in a key crime-solving database that advocates say have left survivors without justice and communities at risk.

Contamination and other errors in DNA analysis have occurred at the Washington State Patrol crime labs, most of it the result of sloppy work. The most common problems are cross-contamination by microscopic traces of unrelated evidence and forensic ...