A NSW Police Integrity Commission has heard allegations that six police officers in the north coast town of Ballina lied about a 23-year-old man assaulting an officer.
Corey Barker, now 24, was accused of assaulting Senior Constable David Hill at Ballina station in 2011.
He was later charged with assault.
But CCTV footage released last year revealed the man was himself the victim of a police bashing.
The footage, which was initially thought to be damaged but was later repaired, led to all charges against Mr Barker being dropped.
It also revealed an alleged police cover-up.
The inquest heard today that four officers gave sworn evidence that Mr Barker had assaulted the police officer, which was called into question in light of the CCTV footage.
They could face charges of conspiracy, perjury and tampering with evidence, Nine News reports.
Mr Barker suffered facial injuries in the attack and waged a long battle to clear his name.
"If I pleaded guilty I would've lost my career and everything... they left me with no option, I had to fight back against them and thank God I did," he said.
Source: Nine News, ABC
Author: Sylvia Varnham O'Regan, Approving editor: Nick Pearson