A man with an injured arm watches three policemen as one addresses the police van driver and two others walk away from the van .
It is probable that the injured man had an altercation with the van driver and passengers .
It is impossible that the injured man had an altercation with the van driver and passengers .
It is probable that the injured man had an altercation with the van driver and passengers .
The injured man had an altercation with the van driver and passengers .