If the fan died of dehydration (no autopsy has been performed per O Globo newspaper online), then the issue is the prohibition of the sale of bottled water in the stadium by the concessionaire and the stadium management.Damn and also this put Taylor Swift a target of political rants and conspiracy theories involving a fan that died in Brazil. The only issue here is that its the concert promoters, local police and stadium security staff that dropped the ball on crowd control in that instance.
There was no issue with police, the promoters or the stadium security. There was a long standing prohibition of bottled or canned liquids in that stadium and in most others in Latin America because a full bottle is a deadly weapon.