Ronquillo was last seen in the vicinity of the 1000 block of east Clarence Street in Fort Worth, Texas on December 12, 2004. She was in the company of her ex-boyfriend, Jorge Meza, at the time of her disappearance. Meza is described as a 29-year-old black-haired, brown-eyed Hispanic male, 5'9 tall and 174 pounds. Photographs of him are unavailable. He resided in Arlington, Texas in December 2004. Neither Meza nor Ronquillo has been heard from again.

Ronquillo's white 2003 Ford Windstar with Texas license plates numbered V39NXM disappeared with her and was reported stolen by her family. It was later located in Nuevo Laredo, Mexico. There was no sign of her at the scene. Ronquillo's family believes she was abducted by Meza and is possibly in danger and being held against her will. Her case remains unsolved.