Judah Adunbi has told ITV News he refused to give his name to officers - because this was the second time he had been mistaken for a Bristol drug dealer.
Bear in mind the trauma I was going through as a result of fear, this matter has happened on a previous occasion.
The Avon and Somerset race relations advisor says he was assaulted by officers when they wrongly believed him to be someone else seven years ago.
On that occasion, Mr Adunbi says, he sustained a lasting disability to his shoulder during that arrest. When he was stopped by two community officers on Saturday and asked if he was this man again, he was so humiliated and angry he refused to give his name.
Since ITV News West Country broke the story yesterday, there has been online criticism of Mr Adunbi for not telling the officers his name.
He maintains he was right not to do so.