FOREST CITY — When the Waldorf University Theater Department had a problem with lights or other technology, Zachery Gueller was always willing to help.
“If you gave him a problem, he would figure out the answer,” said Bob AuFrance of the theater department.
The university lost that help when Gueller was struck and killed Monday afternoon while trying to change a tire on his car on U.S. Highway 218/Avenue of the Saints near Nashua.
State troopers say a northbound Chevrolet Silverado truck hit Gueller as he was preparing to change the tire on his Pontiac. They say the truck then hit the Pontiac, which was parked on the inside shoulder with its emergency lights activated.
Three passengers in Gueller’s vehicle were injured: his girlfriend, Courtney Swessinger, 22; his and Swessinger’s 9-month-old daughter, Serina; and his sister, Kennika Gueller, 22.
The driver of the pickup, Loren Musch, 31, of Clinton, also was hurt.
All four were taken to Floyd County Medical Center. Their conditions were not available Tuesday.
Zachary Gueller, a criminal justice major, met Swessinger in Waldorf’s theater department, AuFrance said. Kennika Gueller also attended Waldorf.
“Kennika waited for Zachery,”AuFrance said. “They wanted to go to school with each other.”
“This is not something they teach you in professor school, that you will outlive your student,” AuFrance said.
Gueller’s death will be felt throughout the campus, which has an enrollment of just over 600 students, AuFrance said.
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Waldorf will host a gathering for fellowship and sharing stories 8 p.m. Wednesday in the Salveson Hall ballroom. Grief services will be available through Waldorf’s campus counselor.
Funeral services for Gueller are 1 p.m. Friday at Fullerton Funeral Home in Mason City, according to his obituary. Visitation will be 4 to 6 p.m. Thursday at the funeral home, and one hour prior to Friday’s service.
This is the second Waldorf student accidental death in about a year. Timothy Brown Jr. died in a April 11, 2015, boating accident at Torkelson Pits Conservation Area in Hancock County. Brown, of Winter Park, Florida, was also a criminal justice major.
Waldorf professor Steve Smith was Gueller’s new advisor this fall. Smith, who is a pastor and religion professor, was helping the criminal justice department.
Gueller, “was a quiet guy,” Smith said.
“He was a low key, quiet guy,” AuFrance said. “Yet, he had a good sense of humor. He was very well-liked by the students.”
“He was concerned about what was best for his family,” Smith said. “That was definitely clear.”
The crash remains under investigation by an Iowa State Patrol technical investigator. The investigations typically take one to three months.
Iowa State Patrol Sgt. Dana Knutson said officials will decide whether to file charges after the technical investigation is complete.
— Globe Gazette reporter Molly Montag contributed to this report.