Police in Iowa are searching for clues after a 25-year-old woman and former all-conference college softball outfielder was fatally shot while driving on a highway — a “random and senseless” shooting that snuffed out the dreams of an aspiring dentist, her father said.

The Waterloo Police Department is offering $7,000 for information leading to an arrest in the fatal highway shooting of Micalla Rettinger, a former University of Northern Iowa softball player who was hit by a single bullet as she drove on US Highway 218 at about 2:30 a.m. Sunday.

Police said the bullet entered the driver’s window and struck Rettinger in the neck — killing her at the scene — before hitting a second occupant, Adam Kimball, 32, whom Rettinger’s father has identified as her boyfriend. A second passenger was not hurt.

Investigators have determined that Rettinger and Kimball were returning home from work at the time, but there’s no indication that the victims were involved in any activity that would have led them to be targeted by anyone.

Police are asking that anyone who may be involved in shooting or hunting in the area of the Cedar River between the Highway 218 Bridge and the Conger Avenue Bridge to contact Waterloo police at (319) 291-4340. Detectives also want to hear from anyone who operates a trail or surveillance camera in the area.

Rettinger’s father, Steven, told the Des Moines Register that he inexplicably awoke at about the same time his daughter was shot. He was roughly 1,400 miles away in Florida, visiting his father, who has cancer, he told the newspaper.

“I must’ve woke up right when it was happening,” he said Monday.

Rettinger said his daughter was an aspiring dentist and a “good-hearted person.”

“She was very committed,” he told the newspaper. “At the same time, she found times for her friends and family and making the world a better place.”

Micalla Rettinger graduated with a degree in biology in 2016 from Northern Iowa, where she earned second-team Missouri Valley All-Conference honors in her junior year. She also led the team in hits as a senior, the university announced Monday.

“I am devastated,” said UNI’s head softball coach, Ryan Jacobs. “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 … This is a huge loss to our team and everyone that knew her.”

The team will honor Rettinger with a moment of silence before a game against Iowa on Tuesday.

Rettinger’s boyfriend, meanwhile, was shot in the face, but he’s expected to survive, Steven Rettinger said. He’s still struggling to make sense of the shooting, he said.

“It seems so out of the ordinary and so random and senseless that I can’t even get my mind around it,” he told the Des Moines Register.