Thursday’s incident at Cannington train station capped off a big night for the 21-year-old who posted photographs on Facebook which appeared to show the right hand side of his face grazed and swollen.

Voller claims he was:

BASHED by eight Perth transit guards;

CALLED“a piece of s---” by police; and

TOLD by the same officers, after they discovered his identity, they would “love to shoot” him.

The Public Transport Authority and police told The Sunday Times that CCTV footage and their officers’ reports of the Thursday night encounter tell a very different story.

The PTA alleges the footage shows an agitated youth flitting from one confrontation to another and goading public officers.

At one stage Mr Voller appears to jump off the platform at Cannington station and on to the railway tracks, pull down his trousers and expose his genitals to the public. The PTA alleges that he then pulls his trousers up before pulling them down and exposing himself again.

The PTA says that when he got back up on to the platform he was arrested by two guards and wrestled to the ground. The PTA confirmed one of the guards involved suffered a facial injury. It is not clear what caused the injury.

The confronting image of Mr Voller strapped to a chair in a spit-hood during an interrogation by jail guards was aired by ABC’s Four Corners in 2016. Prime Minister Malcolm Turnbull called a royal commission into the treatment of mainly indigenous youth at the Don Dale Detention Centre in the NT.The $70 million inquiry uncovered evidence of torture and called for the closure of the centre which the commission found had failed to comply with basic human rights.

Mr Voller said on Friday morning he had been drinking with friends after travelling into the city to see a Fringe Festival act.

He said he caught a train home to Thornlie when the incidents occurred but wasn’t sure what time.“I don’t know, it was late,” he said, before adding that he was “drunk and being silly”.

He said he was getting off at Cannington to swap trains when “I must have said something” because “they (the guards) must have seen me and they all started coming at me.

“There was about eight of them and they got me down on the ground and they smashed my face into the ground. They were all yelling at me and stuff.

“One of them punched me in the face. They then dragged me out and threw me in the back of the transit van.”

He said he sat in the van for about an hour outside of the station.

Mr Voller said they eventually let him out and, along with five mates, he started walking towards Thornlie when a police car came along. One of the officers told the group to sit down and the officers, according to Mr Voller, then did name checks.

“They knew who I was because they said, ‘you think because you’ve been on telly you’re pretty good, but you’re just pieces of s_ _ _,’ and ‘I’d love to shoot you’.” He said after a while they let the group go.

Mr Voller said his face was still sore on Friday morning.

PTA spokesman David Hynes said Mr Voller was initially spoken to for allegedly engaging in disorderly behaviour at Cannington station.

“When the Transit officers left, it is alleged Mr Voller jumped down on to the tracks and exposed himself in front of members of the public,” he said.

“Following this, he was approached by two TOs who spoke to him for seven minutes, during which he refused to provide his details. He was arrested by two TOs.

“Mr Voller was held in the back of one of our vehicles for about 30 minutes pending the arrival of an ambulance, which was called at his request for an unrelated medical condition. He was then released from custody.”

The PTA said it would be charging Mr Voller by summons after it completed its review of all CCTV footage. Mr Voller will appear in court at a later date, where he will be entitled to defend the allegations against him.

A WA Police spokesman said the police encountered Mr Voller at 1.30am on Friday in Sevenoaks Street, Beckenham, when they responded to complaints that four men were jumping out in front of cars. They spoke to four men who were “antagonistic” towards police.

When they carried out name checks, one of the men — not Mr Voller — was arrested due to an outstanding warrant. The other three men were moved on.

When contacted about the CCTV footage of him allegedly exposing himself, Mr Voller texted: “Sorry, I have been told not to comment.”