Teen Dies After Visit to Prof's Condo

April 29, 2008— -- While police continue to investigate the case of a young woman who died after being found unconscious in her professor's Phoenix condominium, the women's family has hired a private detective to look into the man they've called a "predator."

Andria Ziegler, who was 19-years-old, is being laid to rest today by her parents and seven brothers and sisters.

Paramedics responded to a medical call for help around 2:30 a.m. Sunday, April 20, at the home of Michael Todd, a 51-year-old psychology professor at Paradise Valley Community College. Paramedics found Andria Ziegler -- Todd's student for two semesters -- unresponsive. She was transported to a local hospital where she was pronounced dead.

Initial autopsy results did not show a cause for Ziegler's death, according to a spokeswoman at the Maricopa County Medical Examiner's Office. Toxicology tests, which authorities said will likely answer that outstanding question, could take several weeks.

Todd is not currently a suspect, as police cannot yet say for sure that a crime was committed. But his condominium has been combed through as if it were a crime scene, the city's homicide unit is investigating and Todd has retained a lawyer, Mike Roth, who did not return multiple phone calls from ABC News.

The college has also put Todd on paid leave while school officials look into possible administrative violations surrounding his relationship with the student.

"We've had some correspondence with his attorney," Sgt. Joel Tranter at the Phoenix Police Department told ABC News. "He's not been named a suspect."

One troubling detail of the events that morning that has devastated Ziegler's large, tight-knit family and raised eyebrows for investigators is that when paramedics arrived at the house, Todd declined to identify Ziegler. This, even though Todd was her professor and according to family members, had been courting her romantically for two months.

"He knew who she was," Tranter said. "I don't think anyone's going to argue that. He didn't reach out to her parents or anything like that."

Police and Ziegler's family members also said Todd did not accompany Zeigler to the hospital. After she died, she arrived at the morgue as a "Jane Doe," or unidentified female.

By then, her family had already begun to search for Ziegler, who lives at her parents' Phoenix home. "She did not call," Doug McManus, Ziegler's stepfather, said in an interview with ABC News. "That left us to think that something was definitely wrong."