Authorities have arrested a teenager for the fatal attack of an MSU-Mankato student in St. Cloud late last week. The 17-year-old male was taken into custody on Monday for the death of Colton Gleason. The 20-year-old Greenfield man died last Friday from head injuries. Investigators say he was walking with two female friends in an alleyway Thursday night when a car pulled up, one person got out and punched Gleason. He fell backward and hit his head. Police say the assailant wasn’t known to the victim.