An internal Queensland police report has found failures in a gang rape investigation involving an officer now at the centre of a political brawl between the police union and the State Opposition.

Key points: The report has recommended senior police consider disciplinary action against Detective Senior Sergeant Chris Fenelon

The report has recommended senior police consider disciplinary action against Detective Senior Sergeant Chris Fenelon Senior Sergeant Fenelon was stripped of a police medal that was awarded while he was under investigation

Senior Sergeant Fenelon was stripped of a police medal that was awarded while he was under investigation The investigation report has been handed to the CCC for its input and oversight

The investigation report, which examined the destruction of evidence, including a rape kit, just four years after the alleged victim reported the assault on her 21st birthday in Brisbane in 1995, has recommended senior police consider disciplinary action against a detective.

Opposition Leader Deb Frecklington's office has dismissed attacks from the police union over the public scrutiny on the detective, Senior Sergeant Chris Fenelon, who was stripped of a medal he was mistakenly awarded in October while under investigation.

Commissioner Katarina Carrol personally intervened to revoke the honour and senior police apologised to the alleged rape victim, Eve*.

When told of the matter by the ABC, Ms Frecklington said it was another unacceptable blunder in a "very disturbing case".

Ms Frecklington months earlier had co-authored a complaint with Eve to the Crime and Corruption Commission (CCC) about police mishandling of the case including lost evidence from the alleged victim's dress and underwear to police statements, forensic photographs, police database entries and the investigator's notes.

After the ABC's reporting of the case, investigators charged three men who will face a committal hearing in the Brisbane Magistrates Court next month.

Police have told Eve that the Police Legal Division and the Office of State Discipline are reviewing the internal investigation file and its recommendations.

They will advise Deputy Commissioner Steve Gollschewski on options to deal with the matter, with a decision on any disciplinary action expected by the end of January.

The investigation report has been also handed to the CCC for its input and oversight.

Senior police were forced to take the internal investigation away from Ethical Standards Command (ESC) — which routinely investigates complaints against officers — because Senior Sergeant Fenelon now has a senior role in that unit.

The ESC dismissed complaints by Eve about the handling of the investigation when she previously pressed for action on the case in 2016.

Frecklington 'bashing police for votes': Union

Shane Prior, an executive member of the Queensland Police Union of Employees, accused Ms Frecklington in the latest edition of the union's journal of "bashing police for votes", saying that Senior Sergeant Fenelon, a friend of his, had "done nothing wrong".

A spokesman for Ms Frecklington said the criticism from the union was misconceived.

"There is no bigger supporter of the police service than the LNP but when concerning issues are raised it is important to get to the bottom of it to ensure people can maintain the highest confidence in our police," the spokesman said.

"The Police Commissioner stepping in and removing the medal while the investigation is still underway was the right course of action."

Mr Prior's journal piece follows his removal of a Facebook post in October in which he had accused Ms Frecklington of an "appalling pile on" on Senior Sergeant Fenelon.

He shortly after removed the post at the request of senior police.

"I see that according to Deb Frecklington, we need to check with complainants from almost 25 years ago before decent, honest and hardworking police receive medals they deserve," he wrote in the journal.

"I find it bizarre Deb Frecklington has now referred police to the CCC for, in my opinion, simply doing their job.

"I challenge Deb Frecklington to attend our next Police Union conference and she herself can apologise to Fenno and we can get her to present to Fenno the very medal Deb called 'a blunder' when it was rightfully awarded to Fenno in the first instance.

"If politicians like Deb Frecklington can so easily criticise police and ruin people's careers, they can also be honourable and right the wrongs they have caused."

The union secretary Ian Leavers, in the same journal, accused Ms Frecklington of an "extraordinary tirade against one of our members, Chris Fenelon".

"Also of concern was senior police from ESC asking police to take down their personal comments off social media because it attacked the Opposition Leader. We have to have free speech to comment on all sides of politics and I was unaware of the protection racket in place," Mr Leavers wrote.

A police spokesman said: "The QPS can confirm this investigation file has now been referred to the CCC for their consideration."