Parent's Outrage after son, 15, is tied up like ISIS hostage in class by older 'bullies'

Please read this story an comment. A photo showing the boy sitting on the floor with his hands tied behind his back and a hoodie tied tightly over his head was posted on Snapchat another student. 

This is a 15-year-old boy tied up with his hoodie over his face and whipped with an electrical cord at a Minnesota school on Friday as claimed. Outraged boy's parents contacted the police after their son told them what happened and how his teacher hadn't intervened. Father Dave Rochefort likened his son's treatment to what 'the terrorist group ISIS do to the people they kill.'

Local police say they have spoken to the boys involved in the incident who claim that the boy was a willing participant in a staged class display. The teacher who was present in class but did nothing has been placed on administrative leave while the district investigates the incident.

‘Police say there is no criminal activity here!,' Mrs Rocheforte says which got her more upset.
But Really , Is it what a police report?