The hunt for the "Hiker from Hell" is officially on. The FBI has just slapped a massive $100,000 bounty on the masked predator who snatched 84-year-old Nancy Guthrie from her Tucson home. As the search for Savannah Guthrie’s mother hits a desperate Day 12, investigators have narrowed the target to a suspect carrying a specific black Ozark Trail hiker pack. But the mystery goes deeper. Chilling letters sent to TMZ demand a Bitcoin ransom, with a cryptic tipster warning: “I am not being taken seriously.”