Authorities in Arizona have confirmed thatDNA and video analysisis under way in theNancy Guthriecase, as investigators saymore than 3,000 tipshave been received since the 84 year old mother of TODAY anchor Savannah Guthrie vanished from her Tucson home in early February.

Nancy Guthrie was last seen on the night of 31 January at her home in Tucson by her daughter Annie and son in law Tommaso. In the early hours of 1 February, images and footage later released by the FBI appeared to show a masked intruder arriving at the property. Since then, local authorities have treated the incident as a disappearance and apparent kidnapping.Savannah Guthriealso took a two month leave of absence from NBC to be with her family in Arizona.

The case quickly grew beyond a local missing person inquiry. The Pima County Sheriff's Department sought help from federal authorities, with theFBI and other outside investigatorsnow working alongside local detectives. That level of coordination is unusual in a domestic missing persons case. It has also reinforced the view that the investigation is both complex and highly resource intensive.

Marking three months since Nancy Guthrie disappeared, the Pima County Sheriff's Department issued a fresh public statement saying the case remains active and that forensic analysis is now a major focus.

'The Pima County Sheriff's Department remains fully committed to the investigation into Nancy Guthrie's disappearance,' a spokesperson said in a statement shared withHELLO!.

The department said the inquiry remains active and ongoing and confirmed it is continuing to work closely with the FBI. According to the statement, DNA and video analysis are being carried out with support from laboratories across the United States.

Investigators said advances in technology are helping their efforts, although they have not publicly described the specific evidence being tested. That means key parts of the forensic picture remain out of public view.

The same statement also confirmed that tips are still being received and reviewed. Officials thanked those who have already come forward and again urged anyone with credible, actionable information to contact investigators, stressing that even minor details could prove important.

That appeal reflects how much the case now depends on outside information as well as forensic work. With no suspect publicly identified and only limited confirmed detail about what happened inside the home, detectives are trying to piece together events from surveillance footage, physical evidence and witness recollections.

The scale of the public response has been striking. According to figures cited by local outletKVOAand referenced byHELLO!, 360 new tips were submitted to the anonymous reporting line 88 CRIME in the last month alone, pushing the total beyond 3,000 since Nancy Guthrie disappeared.

Source: International Business Times UK