Stoos' grandfather, Larry Stoos, says the hotel clerk called police, probably because the two are 16 years old. New Orleans police called the Stooses about 7 p.m.
Stoos' mother, Tammi, told police she last saw her daughter Oct. 3, when she dropped her off at Van Deinse's home. The boy's father later filed a missing persons report.
Investigators say the two last used their cell phones near Chicago on Oct. 3.