Garner, N.C. — A Hispanic woman found unconscious along a Garner road died late Tuesday, police said.

A driver found Mayela Orduna, 18, of Red Oak, Texas, on the shoulder of Aversboro Road near Old Scarborough Lane at about 3:30 a.m. Tuesday.

Orduna died at 11:35 p.m. Tuesday at WakeMed, said Sgt. Chris Clayton of the Garner Police Department.

The driver told authorities Orduna had a head injury. Preliminary autopsy findings, released Thursday, indicate that Orduna died of a head injury consisten with exiting a moving car, Clayton said. 

Orduna and her boyfriend, Spencer Bolick, hosted a party at their apartment late Monday and early Tuesday, Bolick told police. He told investigators that he argued with her, and they left in his 1993 Crown Victoria.

As he drove along Aversboro Road, Bolick told police, Orduna jumped from the car. He then returned to the apartment and told friends about the incident, he said, and one of them drove out to Aversboro Road to look for Orduna.

Another driver had already found her unconscious along the road and had called 911.

"Based on our interviews with people, she fell out of the car. At this time, we're still investigating as to how that happened," Clayton said.

Bolick filed a missing person report on Orduna with Garner police at 10:45 a.m. Tuesday. He declined to comment about the case Wednesday.

Police searched the apartment at 3200 Madison Farm Court and the Crown Victoria as part of the investigation and seized marijuana, drug paraphernalia, two purses, a bra, paperwork and an empty pill bottle with white residue, according to a search warrant.

Police identified Orduna by the prescription on another pill bottle found in her pocket, according to the warrant. They contacted her family in Texas, and her mother, Susan Gasca, told investigators that Orduna had moved to North Carolina with friends she had met at Marine boot camp.

Police are investigating the case as a "suspicious death," Clayton said.

"The (Wake County District Attorney's Office) will make the decision on what, if any, charges are appropriate," he said.