A Birmingham charity boxing event descended into violent farce when brawls erupted outside of the ring at Wolverhampton Civic Hall.
Officers arrested three men on suspicion of affray after punches were thrown by audience members at the event at the civic hall on 18 October.
No injuries were reported, however a number of people who witnessed the violence claimed they feared for their safety.
Police have now released an image of a woman they want to talk to about the incident.
Narinder Sandhu, of West Midlands Police, said: "This was an event to raise money for a disability charity - between a police boxing team and a group of local boxers - and it is a shame that some members of the audience decided to start their own match outside of the ring.
"We've arrested a number of people already in connection with the offence and two others have been voluntarily interviewed about it.
"There is one woman though who we suspect may have also thrown a punch during the disorder. Despite our best efforts, we have been unable to identify her and I would urge anyone who knows her to get in touch."
Anyone with information is urged to call police on the 101 non-emergency number, or the independent charity Crimestoppers anonymously on 0800 555 111.