She left work that Sunday around 5 p.m. and headed to her off-campus Ypsilanti apartment.
Two days later, on Dec. 11, police discovered her body. She was found in an unnatural position in her bathtub, although there were no obvious signs of trauma to her body, such as bruising. Police found no signs of forced entry.
But the scene pointed to foul play.
Her death was ruled a homicide. It was later determined she died from asphyxiation by drowning, police said.
Four months later, her death remains unsolved.
Police have interviewed dozens of people, but they still haven't been able to answer the question: Who killed Julia Niswender?
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Officers have interviewed more than 100 people, including friends, family, neighbors, acquaintances, security guards and classmates from high school and college. Investigators have traveled to Ohio, the Upper Peninsula and throughout southeast Michigan talking to people who may know something.
"We've also polygraphed numerous people," Yuhas said. "Everyone that has been polygraphed at this point has not only cooperated with the investigation but passed the polygraph."
Police executed more than 10 search warrants, including ones on social media accounts and homes.
"We still have a current list of names that we need to look at and a 'to do' list," Ypsilanti Police Detective Annette Coppock said.