Jasmen Gonzalez was last seen at about 11:45 Saturday night. She and her parents are from Oklahoma City and were visiting relatives in the 1300 block of Walnut Street, near the intersection of Belt Line Road and Interstate 35E.
Police said Jasmen might have wandered out of the house after going to bed. She is unfamiliar with the area.
The Dallas police helicopter, a Child Abduction Response Team and the FBI have all joined in helping Carrollton police in the search for the missing child. A Carrollton police spokesperson said while they are involved in many cases of missing children, this one is "unique." No Amber Alert had been issued as of 1 p.m. Sunday, however.
FBI agents were going door-to-door speaking with residents, and every car attempting to enter the two-block radius around the Walnut Street address was being stopped.
"We want to know who is coming in and out," News 8 was told.
Police said they are also looking for a white Ford F-150 pickup truck with Texas license 33C-NZ9 as part of their investigation.
Jasmen is described as Hispanic, 4'-3" tall, 90 lbs. with long brown hair. She has a small mole on her upper lip.