New questions have arisen about why a man in custody who was repeatedly tasered by police was also charged with obstructing police.

It has been revealed that on the night Kevin Spratt was tasered 13 times by police, he was also charged with obstructing officers.

The events occurred at the East Perth Watch House in August 2008 and no police were charged over the incident.

The formal police statement says Mr Spratt became violent and aggressive to police who were attempting to restrain him, by kicking and flailing his arms around.

This account contradicts video footage of the incident released by the Corruption and Crime Commission, where Mr Spratt appears subdued the entire time.

A spokeswoman for the Police Commissioner says internal investigators are still reviewing the event as is the CCC.