Investigators have turned to genetic genealogy to identify DNA found at Nancy Guthrie's home after her kidnapping.

DNA recovered from inside Nancy Guthrie's house may not provide enough evidence to help investigators identify the people behind the disappearance of the mother of "Today" show co-host Savannah ...

SCOTTSDALE, Ariz. - A judge in Maricopa County has thrown out the DNA sample that led to the arrest of a man accused of killing a Scottsdale woman in 2015. The murder of Allison Feldman confounded ...

SCOTTSDALE, Ariz. - The state of Arizona is appealing a ruling regarding the use of a suspect's DNA in connection to the murder of Allison Feldman, a Scottsdale woman who was killed in 2015. It took ...

The Pima County Sheriff previously said the DNA recovered from Nancy's home is mixed, which complicates the process of getting results.

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 ...