Rather than call police or paramedics, however, the male allegedly drove Sorich's body in her car to Bountiful Canyon. He then took her car to Salt Lake City, where he abandoned it at 600 North and 900 West, Starks said.

Tuesday afternoon, Draper police searched the female's home, where the three allegedly had their party. Her parents were away for the weekend, said Draper Police Sgt. Gerry Allred.

Investigators found evidence that confirmed Sorich was in the house, he said. They also found evidence that indicated the female knew the male was disposing of Sorich's body, Allred said. Police also believe the female may have tried to hide evidence that linked Sorich to the house that night, Allred said.

The investigation by Draper police was continuing Tuesday. Allred said detectives still need to determine at what point Sorich's friends knew she was dead and to what extent they were neglectful in rendering aid.

Police discovered Sorich's silver Volkswagen Jetta on Monday night. Starks said some blood was found in the back seat. Detectives also found her purse, cell phone, credit cards and other personal items in a nearby Dumpster.

South Jordan investigators went through the contacts listed on her cell phone and came across the name of the 19-year-old man. When police interviewed him the first time Monday night, he seemed "fidgety," Starks said. When he returned Tuesday morning to talk with investigators, Starks said he was unsure if the man knew at that point that Sorich's body had been found.

Sorich has three brothers, one of whom is flying home from out of the country to be with the family for the funeral, which hasn't yet been announced.

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Contributing: Wendy Leonard

E-mail: preavy@desnews.com