Authorities are offering a $1,000 reward for information on the fatal assault of an MSU-Mankato student in an alley in St. Cloud. Twenty-year-old Colton Ryan Gleason of Greenfield was attacked Thursday night. He died of head trauma Friday at a St. Cloud hospital. Gleason was reportedly walking with two female friends when an older four-door mid- to full-sized light colored car stopped. Several people got out. One punched Gleason once, causing him to fall backward and strike his head. It’s still unclear what prompted the assault, but police say they have no reason to believe he and the assailant knew each other.