Yes but it will inevitably rely on assistance from Miseryside Police. If or when GMP get a facial image of the bloke who threw it they will have to find his identity and that will need the local police to either know him or circulate it where people may know him.
why do we need to have
facial image of the bloke who threw it they will have to find his identity
look, when you go to a game of football you are representing your club ? if somebody steps out of line, then you ban all of them, the police close clubs and pubs down because of trouble in or outside the place, Manchester city and GMP should ban all Liverpool fans from the next game at the Etihad, then if there is any more trouble in the future then a banning order should be put in place for 5 years