The football team canceled its season and the coach subsequently resigned.
The school's football season was canceled last month.
Details of the alleged misconduct have not been provided by authorities.
The Proctor School Board chair stated their policy during Monday's board meeting.
Football activities for grades 9-12 have been paused amid the investigation.
The crash was reported just after 3:20 a.m. Wednesday.
The new Kwik Trip will be the 12th to open in Duluth since 2014.
The victim, from Proctor, was a passenger in a car that crossed the centerline.