India, April 21 -- Months after Nancy Guthrie disappeared from her home in Tucson, Arizona investigators are taking a fresh look at key evidence and hoping new DNA technology could finally bring answers in the case.

NewsNation reported on Friday that DNA samples, including hair from Guthrie's home in Tucson have been sent to the FBI lab for further testing. This evidence was already tested at a Florida lab working with the Pima County Sheriff's Office but investigators are now hoping that whole genome sequencing could lead to a breakthrough.

Whole genome sequencing is different from regular DNA testing. It can extract DNA even from a strand of hair without the root which means even small samples can be useful. This same technology helpe...