Hey, read between the lines.
The Police attended an altercation. The alleged aggrieved left the scene. The two that remained at the scene were arrested for affray (a minor charge, usually used when insufficient evidence gleaned to arrest for assault) in order to ensure that a re-occurrence did not occur. They were interviewed and released on Police bail, which shows that there was insufficient to charge them with. The third party is now being sought to provide evidence of any actual offence having been committed.
I would suggest that this case is going nowhere. Move on if you please.