At the start of the year, a group of 57 Native Americans students from the Lakota tribe were taken to a minor league hockey match in Rapid City, South Dakota to celebrate their academic achievements. But what started as a field trip to reward the students quickly turned into a nightmare, when a group of drunk men in an executive suite dumped beer on their heads and yelled “go back to the Rez!”

The Crow Creek Indian Reservation lies along the Missouri River in central South Dakota, an area marked by rolling hills of corn fields, a government-constructed dam and a Native American town centered around the tribe’s casino.