Nottingham's chief anti-social behaviour officer has been arrested over an incident of "violent disorder".
Richard Antcliff, who is in charge of the team at Nottingham City Council, was one of 15 men who were arrested on Sunday 7 December, police said.
The men were all suspected of being involved in "violent disorder" in Nottingham city centre in which four men were injured on 16 November.
The men have all been released on bail until 3 February 2009.
Mr Antcliff said he was unable to comment on the situation.
A spokesperson from Nottingham City Council said they were unable to comment on whether Mr Antcliff had returned to work but confirmed he was the chief anti-social behaviour officer and remained so.