According to the agency, agents found the girl's brother -- along with a Mexican woman and Guatemalan child -- in the back of a car during an inspection at the Arivaca Road Immigration Checkpoint Sunday afternoon. They arrested the driver, a 62-year-old man from Arivaca, on human smuggling charges.
Agents discovered that a 13-year-old girl, who was the sister of the boy, was separated from the rest of the group and left with smugglers at a home near Arivaca.
After a 24-hour search, agents found the girl in a home with a 24-year-old man who was allegedly in the country illegally.
The girl was unharmed and taken to Tucson. Agents helped the girl and her brother speak with their mother, who lives in the U.S.