An investigation into whether a constable in Western Australia used excessive force while dealing with two men earlier this year has found his actions may constitute assault.

The Corruption and Crime Commission (CCC) investigation centred on the former officer's treatment of two detainees inside the Broome lock-up and the inaction of other police present.

During the first incident in March, an 18-year-old man, whose hands were cuffed behind his back, was dragged through the Broome police station by the constable in a potentially dangerous neck hold.

In CCTV footage released on Monday, the teenager is seen with his head seemingly pulled back. At one point both his feet are off the ground and he is seen to slump.

The CCC says other police did nothing to intervene.

The teenager was then taken to a padded cell and stripped naked by five police officers.

Three weeks later, the same officer who used the neck hold is seen retaliating after a 31-year-old Aboriginal man punched him.

In the CCTV vision the officer can be seen punching the man back, before dropping his knee onto his head.

The constable then pushes the detainee through the door and he drops to the floor, falling onto his face while his hands are cuffed behind him.

He is then left face down and is unresponsive.

Constable used excessive force: CCC

The CCC's report, tabled in Parliament on Monday, is highly critical of the officer, saying he used excessive force on the Aboriginal man on several occasions, including:

- punches to the man's head and upper body in the sallyport;

- the knee drops to the man's head;

- gripping onto the man's hair to lift him from the floor;

- throwing the man through the charge room door while he was handcuffed behind his back;

- dragging the man across the charge room floor by his jaw

The report said the officer's actions constituted misconduct and could constitute a common assault, though the man is yet to be charged.

The officer, whose name is suppressed, resigned in May.

The CCC report also said it recognised that police in Broome face unique challenges, including the highest rate of assaults on police and a significant amount of alcohol-related crime.

The Commission voiced its concern over the adequacy of supervision with nine other officers criticised for failing to intervene and report the two incidents.

Commissioner rejects criticism of supervision

WA Police Commissioner Karl O'Callaghan says the incidents are regrettable and disappointing.

But he has rejected a claim in the report that suggests a systemic failure of adequate supervision within the police force.

"The Corruption and Crime Commission have looked at two incidents," he said.

"There are thousands of lockup admissions in Western Australia every year and I find it difficult how you can draw that kind of conclusion from two incidents alone so we reject that particular suggestion out of hand."