July 12 (UPI) -- A mother and daughter in Minnesota died after a boulder fell off a truck in front of them and smashed into their vehicle, police said Thursday.
Monday afternoon, Karen J. Christiansen, 67, was driving with her daughter, 32-year-old Jena H. Christiansen, when a boulder weighing several hundred pounds became dislodged and fell off a commercial truck as they were driving in Rosemount, Minn., police said in a statement.
Both women were declared dead at the scene. The Hennepin County Medical Examiner said the cause of death was blunt force trauma to the head.
Authorities said the truck driver didn't stop after the boulder fell off, but police identified him as 33-year-old Joe P. Czeck and arrested him Wednesday. Charges have not been announced. Czeck is also the owner of the company that operated the truck.
Rosemount Police Chief Mitchell Scott called the accident a "very unique situation."
"If you tried to duplicate this millions of times, I don't think you'd be able to do that," Scott told KSTP-TV.
Jena's boyfriend, Ryan Kilian, said, "The world has lost an angel."
"She is the most amazing person I have ever met," he said. "She was so smart and beautiful. She made me the man I am today I would be nothing without her. She would do anything for anyone who needed help she loved her family so much. She had an amazing sense of humor I literally have spent hours just talking to her."