This image shows police officers after a shooting at Seattle Pacific University in Seattle on June 5, 2014. Mat Hayward/Getty Images

A 25-year-old Iowa woman was killed early Sunday morning when she was shot and killed while driving home on a highway.

Micalla Rettinger, a standout softball player, was heading home after a late night at work along with two passengers. She was then struck in the neck by a bullet and swerved off the road. Her boyfriend, Adam Kimball, 32, was shot in the face but is expected to survive, while the other passenger was not hurt.

Investigators have found no evidence of Rettinger and Kimball involved in any type of activity that would lead to a shooting.

News of her death spread quickly, with the University of Northern Iowa’s Athletics’ Director David Harris responding to the news on the department’s Twitter page. Rettinger graduated from UNI in 2016 with a degree in biology and had plans to become a dentist.

UNI’s head softball coach Ryan Jacobs, who coached Rettinger, spoke about the incident on the UNI Athletics’ website.

"I am devastated. KK was a pretty special kid to us. I can still see the smile on her face and I remember the way she always thought of other people first in a genuine way. When we had youth camps, she was the one that all of the kids on campus would be drawn to. This is a huge loss to our team and everyone that knew her," Jacobs said.

Police in the city of Waterloo asked the public for help, offering a $6,000 reward for information that leads to arrests.

"We are asking for the public’s help in locating any person who may be involved in shooting or hunting (legal or illegal) in the area of the Cedar River between the Highway 218 Bridge and the Conger Ave Bridge. We are also asking anyone who may have seen any suspicious activity in this area or has a trail/surveillance camera in this area to contact the Waterloo Police Department Investigations Division," Waterloo Police said.