Four men have been arrested....
GMP believes they may have witnessed what happened....
GMP is hoping the woman’s next-of-kin may recognise what she was wearing....
GMP is keen to speak to any potential witnesses....
GMP is keen to notify the woman's next-of-kin....
Two teenage girls sustained serious injuries in the distressing incident last year....
Officers have called it "a great result" for the local community....
GMP says enquiries remain "ongoing" to identify anyone involved in committing offences....
Investigations are ongoing....
