Pima County Sheriff Chris Nanos is addressing theories that one of Nancy Guthrie's family members could be involved in her disappearance. "The family has been fully, 100 percent completely, whatever we asked for, they've done," Nanos shared with Fox News reporter Matt Finn on Friday, February 13. "It was getting crazy out there with allegations about the family." Guthrie was last seen alive in Tucson, Arizona, on January 30 after enjoying dinner with family members.