Investigators said Ollinger died suddenly and there was no obvious cause of death initially.
Trippe said there were no other factors in her death.
According to the Mayo clinic website, sudden cardiac arrest occurs when the electrical system to the heart malfunctions and suddenly becomes very irregular, versus a heart attack that is typically caused by blockage.
Ollinger, a resident of Stevens Point had been involved in a car accident just two days before her death. However, police said the crash was an unlikely factor.