Cedar Falls police are releasing more details about the weekend death of a teenager. Police say 17-year-old Christopher McCully of Evansdale had been riding on the trunk of a car on Saturday night when he fell off.

The car was reportedly moving slowly, still, McCully’s head injuries were severe. He was taken to a local hospital, then transferred to University hospitals in Iowa City, where he died on Sunday.

The driver was not charged. The accident happened in a Cedar Falls mobile home park.