The Pima County Sheriff is addressing those theories that Nancy Guthrie's son-in-law had something to do with her disappearance. As you know, Savannah Guthrie's mom suddenly went missing over the weekend. Since then, more and more details have come out to suggest something more sinister is going on beneath the surface. Most notably, followers of the case have been theorizing that Nancy's daughter Annie Guthrie's husband could be a potential suspect.