The girl and 46-year-old Lester Hobbs were last seen on Saturday -- the day before Hobbs' estranged wife Tonya was found dead inside his motor home in Geronimo.
An Amber Alert was issued in Texas because investigators believed Hobbs may have traveled there.
Oklahoma State Bureau of Investigation spokeswoman Jessica Brown says there have been no substantiated sightings of the two or the white 2002 Toyota Paseo they are believed to be traveling in.
