If the attack was in the daylight hours on a weekday - who knows why?
Unusual for just one person to be at a KH (though might be collecting, dropping off trolley carts I suppose?) and then be attacked by a random stranger though.
Hall cleaning disturbed/Judicial committee gone wrong? But doesn't mention witnesses (as in witnesses to the crime).
The fact that a man was arrested nearby makes me wonder why he "hung around" to be arrested.
Hope we find out and it doesn't get buried and forgotten what with the UK election coming up tomorrow.