Authorities are investigating a serious injury crash involving a state trooper in Forest Lake on Sunday. According to the Minnesota State Patrol, a state trooper was involved in a crash at I-35 near 220th Street. Officials said the trooper and the driver of a Lexus sustained serious injuries and were brought to the hospital. The Forest Lake Police Department is investigating the crash. Credit: Anthony Smieja Credit: Anthony Smieja Credit: Anthony SmiejaThis is a developing story.