The WA Police Commissioner Karl O'Callaghan has defended his decision not to press criminal charges against the officers involved in the repeated tasering of a man in 2008.

The Commissioner has told the Corruption and Crime Commission inquiry into the tasering of Kevin Spratt that he instead chose to pursue internal disciplinary proceedings.

Mr O'Callaghan testified that he did not believe Mr Spratt wanted the officers charged.

However, Mr O'Callaghan made the decision without seeing a transcript of an interview between Mr Spratt and internal affairs officers which indicated otherwise.

The Commissioner also gave evidence that a flow chart of the event, including Mr Spratt's prior offending, was released publicly to clarify a situation which had become confusing to police, the media, and the public.

The document was released despite police being aware of errors in it including that Mr Spratt had behaved violently before he was tasered.

The Commissioner said the document was originally prepared for police purposes.

Earlier today, Superintendent Graham Moon told the hearing that he was working at the police complaints administration centre at the time of the incident.

He said it was one of the worst he had seen and the officers' actions in the watchhouse were unwarranted.

Superintendent Moon then referred the video to deputy commissioner Chris Dawson.

He said after watching the video, the deputy commissioner wanted legal advice on the case, as well as a media strategy.

Meanwhile, the CCC has revealed it has received anonymous information which could be useful in its investigation.

In closing, counsel assisting Peter Quinlan said the CCC had received some potentially useful information from an anonymous source and wants the person who provided the information to come forward.