Pima County Sheriff Chris Nanos warned that the suspect in the disappearance of Nancy Guthrie could "absolutely" strike again, as the search for the missing mother of NBC "Today" show co-host Savannah Guthrie approaches six weeks.

Nanos, who has faced criticism over the month-long search that has not yielded results, indicated he believes he knows why Guthrie was targeted, though he did not elaborate on the suspected motive. The sheriff's comments come as the investigation continues with no arrests announced.

Guthrie, the mother of the prominent television journalist, has been missing for approximately 40 days. The case has drawn national attention due to her daughter's high-profile role at NBC News.

Footage from a 2013 "Today" show segment has resurfaced during the investigation, showing Nancy Guthrie demonstrating proper bed-making techniques to Savannah and her colleagues. The clip has taken on new significance as investigators continue their search for the missing woman.

The Pima County Sheriff's Department has not released details about potential suspects or specific evidence in the case. Nanos's warning about the possibility of future incidents suggests investigators believe the disappearance was not random, though official details about the investigation remain limited.