After Ziegler went missing, he tried to reach out to Todd by phone and e-mail and ultimately drove over to his condominium, where he found his stepdaughter's car.
McManus said at the time of Ziegler's death that his family, which includes seven brothers and sisters, believed that Todd had been trying to win a date with his stepdaughter for weeks.
Since her death, Ziegler's family learned that she had been at Todd's house the Wednesday before her death, McManus said.
Reports have surfaced about potentially inappropriate relationships between Todd and his female students. In 2002, Paradise Valley Community College required that he take an online sexual harassment course after a report about his behavior. On May 8, the chancellor of Maricopa Community Colleges, a group that includes Paradise Valley belongs, recommended his termination for violating the school district's "amorous relationships" regulation.
Todd has declined to comment. His attorney, Michael Roth, did not return a phone call from ABC News about the 911 call. After the death, Todd released a short statement through his attorney: "Mr. Todd, as well as everyone here at Roth and Roth would like to extend our prayers and condolences to the family and friends of Andria Ziegler during this tragic time."
His condominium was ultimately searched as a crime scene, but because of the time lag connected to her "Jane Doe" status, Tranter said that the evidence collected may have been compromised.
Ziegler's family, while satisfied with the police investigation, remains unsatisfied with Todd despite his job loss. "This guy is a sexual predator," McManus said. "I hope he's locked up. Justice will be served."