A woman dragged to her death behind a vehicle was identified Thursday as a mother of three from the Mexican state of Guerrero, the Mexican consul general said.

Luz Maria Franco-Fierros, 49, was identified through fingerprints, Consul General Juan Marcos Gutierrez Gonzalez said. Franco-Fierros was from the city of Chilpancingo, the capitol of Guerrero.

Her battered, disfigured body was discovered early Monday along a subdivision road north of Castle Rock, about 20 miles south of Denver. Investigators say Franco-Fierros had been dragged behind a vehicle for more than a mile, leaving a bloody trail. Preliminary autopsy results said she suffered fatal head injuries and strangled as she was dragged.

Crack the case in FOXNews.com's Crime Center.

Jose Luis Rubi-Nava, 36, was being held without bail on a charge of first-degree murder.

Friends told the Rocky Mountain News that the woman lived with Rubi-Nava, even though he had a wife and children in Mexico. Cesar Gustavo Flores, 20, a roommate, said the couple sometimes argued violently.

Spokeswomen for the district attorney, the Douglas County sheriff and the coroner declined to comment Thursday. Rubi-Nava's public defender, Kathleen McGuire, did not immediately return a call.

A judge sealed court documents and said he would consider McGuire's request for a gag order.

In his only public statement since the arrest, Sheriff Dave Weaver did not say how the arrest was made or how the few known clues fit into the case.

Among those clues is a widely circulated photograph found somewhere near the crime scene showing Rubi-Nava standing beside an unidentified woman, his right arm resting on her shoulder. Weaver said Wednesday he did not know whether the woman in the photo is the victim. Flores told the Rocky Mountain News that the woman in the photograph was Rubi-Nava's wife in Mexico.

Immigration and Customs Enforcement officials said they believe Rubi-Nava is an illegal immigrant from Mexico.

Denver police confirmed Thursday they arrested Rubi-Nava on a traffic charge in April but released him.

Police spokeswoman Virginia Quinones said the arresting officer suspected Rubi-Nava's identification may have been forged, but she said the department was not responsible for verifying a suspect's immigration status, and a new Colorado law directing police to cooperate with federal immigration officers was not yet in force.

Crack the case in FOXNews.com's Crime Center.