We still believe in a miracle, Guthrie said in a video last week announcing a $1m reward for her mother's return in an enduring mystery that has gripped the US for four weeks. We also know that she may be lost. She may already be gone.
They're not looking for her! So we have to step in. Hernandez, 66, a retired food service worker from Nogales, Arizona, expressed frustration with authorities' efforts. The Searching Mothers of Sonora have used pickaxes and shovels to locate hundreds of bodies of victims of drug and gang violence in Mexico themselves over the years, decrying government inaction all the while.
Jo Jo Dullard (21) went missing on November 9, 1995, while she was on her way home to Callan in Co Kilkenny after she was out socialising in Dublin. She missed her last bus home to Kilkenny and boarded a 10pm bus to Naas in Co Kildare, planning to hitchhike the rest of the way to her home.
The strategy could be fruitful: If unidentified DNA evidence can be connected to someone - even a distant relative - in a common genealogy database, it would give investigators more information and possibly lead to a suspect in Guthrie's kidnapping in Arizona. "It's a fantastic tool," said Ruth Ballard, a geneticist in California who specializes in DNA and has testified in hundreds of court cases. "If it's a good quality sample and they're able to get a profile, they could find a hit on that fairly quickly."