"We really don't know how long we have." Dahlgren, now 23, was one of 13 players injured on April 6, 2018, when his junior hockey team's bus and a semi-trailer collided in rural Saskatchewan. Sixteen people — including 10 players — were killed. He tells his story with the help of a ghost writer in the book "Crossroads," which was released Tuesday. The crash nearly three years ago left Dahlgren with a traumatic brain injury, neck and nerve damage, a fractured back and multiple other injuries. He still can't remember anything from the crash. He woke up in hospital four days later. Despite his lack of memory, Dahlgren said he tried to be open and honest in the book about who he is as a person.