Hi Mike
Blimey this case is dragging on, is the assault charge racially aggravated ?.
I take it you have been served with the witness statement as prosecution disclosure?.
For your information, the comment "he doesn't know the attacker but would recognize him if he seen him again", is obviously important but it is a very basic mistake by the police to include that comment on an evidential witness statement particularly in a case where identification is disputed (the type of mistake a Chief Inspector would make).